During the early years of my life I developed a love and fascination for the feel of soft, white cotton underclothing.  This was probably from seeing and touching various underwear around the house after it was ironed.  Adults when undressed to their white underwear seemed so much more soft and cuddly, and as a young boy, I particularly found that soft cotton underwear was lovely to touch, although that was in a non-sexual way.  The wonderful, warm aromas of freshly ironed knickers and underpants accompanied me to bed on many occasions, and I always slept happily. But eventually the time arrived when my first sexual links between soft white cotton underpants, girls, and masturbation were formed.  It proved to be a wonderfully exciting time during the long, hot summer holidays of my fourteenth year. I had many school friends, both male and female, but soon four of us, Rodney, Susan, Val and I went around together quite a bit.  One day, while we were walking home after our usual Saturday at the local youth club, we began to talk about things that we had heard some older club members talking about.  Sex was naturally high on the agenda, and we chatted and giggled our way along past the river and towards the woodland beyond.  By that time, Susan was trying to tell us something that she had heard one of the older girls saying.  It was about how the older girl had wanked off her boyfriend, and how they had both enjoyed it so much. Rod was much more confident than I, and he managed to explain how masturbation led to sperm shooting from an erect cock.  The girls had both seen erect cocks, and had obviously shared Susan's story.  I was very shy at the talk of such things, and was somewhat stunned into silence, but my penis was hard, and it was aching to be touched and masturbated in my favourite underpants, which I enjoyed doing most days. Then to my amazement, Rod said that he and I would show them 'how cocks spurt'! I was very shy and nervous, and mumbling that I would just watch, I followed him and the eager girls over to a secluded spot in the sun near the edge of the copse.  Hidden by a bramble bush, Rod undressed, while we three sat down on the dry grass.  Then he slowly stepped out for us all to see. We all gazed at his big erection which was big and stiff inside his nylon underpants, and watched with somewhat embarrassed excitement as he rubbed and played with it through his pants.  The girls went closer, and at his confident invitation, put their hands tentatively on his underpants and gently rubbed his cock.  They giggled quietly, but were obviously intrigued, just as I was.  Gradually the giggling ceased as the girls became aroused, and they allowed their dresses to slide upwards so that we were able to see their stocking-tops and suspenders.  I was silent, just watching everything as the girls played with Rod's stiff cock in his underpants.  Soon the girls had opened their legs so that their knickers were showing and I moved a little closer to see them.  My cock was very stiff and throbbing and aching in my underpants as I gazed at their beautiful big, white knickers.  I could see that the girls were feeling sexy as they pulled each others dresses right up and touched their knickers for us boys to see them better.  Then they all turned around to me,  "Come on," said Rod.  "You join in as well".  The girls backed him up, saying, "Yes, shy boy, let's see your underpants, too.  Show us what you've got".  I was as red as a beetroot, for all this was so new and embarrassing to me, but at the same time, my cock was driving me wild with a desperate longing to play with it.  And then I had no choice as they insisted that I expose myself to them . Slowly, feeling in a daze, I started to undress.  The girls pounced, and very quickly I was undressed, and my favourite pair of soft, white, cotton underpants were fully exposed to their eager eyes. "Ooooh, he wears the same sort of underpants as my dad" exclaimed Val, putting her hand out to touch them.  "They are so soft and white," she murmured.  Susan agreed, and to my surprise she pulled my underpants up a little by their smooth, elastic waistband, adding softly, "Mmmm, nice underpants, very nice, I could go for those underpants".   That thrilled me to bits and gave me some more confidence, for I was secretly very proud of my soft white underpants.  To my relief, my cock had gone down to half-hard with my fear and the exertions of undressing, and the girls' attention returned to Rod's full erection.  But the moment I was able to think about what the girls had said about my underpants, my cock was as stiff as ever.  Then I heard the girls saying, "Let's see his cock.  Let's take it out of his underpants".  I knelt up and watched as Rod, with some help from the girls, pulled his cock from his underpants and they ooh'd and aah'd at it as he held it pointing towards them.  It was a handsome cock, and he slowly wanked it for them to see how to do it.  One by one they put their hands around it, and tried wanking it gently.  It all looked incredibly exciting for me, too, and very quickly, my cock was as hard as it had ever been, and my underpants were poked stiffly out at the front as I gently rubbed my cock through them.  The girls were very excited with Rod's erect cock, and when Val took her turn at playing with it, Susan turned and saw what I was doing.  Emboldened by my arousal, I lay back, and the effect was stunning as she put her hand out and gently stroked my underpants.  I felt Rod move closer, and saw that he and Val were still slowly wanking his cock outside of his underpants.  I wondered if I should take my cock out, but then Val started to stroke my underpants, too, and I moaned in ecstasy, for I knew that they both liked my underpants better than Rod's.  I was in heaven then, and because I had earlier wanked and cum in the bath, I was not cumming too quickly.  The girls looked excitedly on while we both slowly wanked, sometimes stroking their stockinged thighs with their free hands as they watched us.  Susan then whispered for me to take my cock out. For a moment I was too shy to do so, and hesitated, but she quickly pushed my hand away, saying sexily, "I can take it out of your underpants for you".  Slowly, but confidently, she started to ease my erect, throbbing cock towards the little slit entrance at the centre of my soft underpants, and it felt wonderful.  She did not hurry, recognising that the feel of my underpants on my cock was driving me crazy with a desire to explode in them, as in fact I often did.  She murmured that my nice soft white underpants must have heightened my sexual feelings and that she wanted to come closer to see me spurt.  Then Val, having heard what Susan said, moved closer, saying, "Oooh, aren't his underpants nice and soft and sexy". I was overjoyed that they both seemed to like my underpants and my cocked stiffened even more. "Oooh," she added, touching my cock, "They make him so hard, don't they, and I always think that pure white underpants look so nice too, just like our white knickers". At that moment, Susan succeeded in easing my cock right out of my underpants.  I gasped and looked down to see its long shaft as she pulled it out through their little slit.  Both girls put their hands on it and I let out a moan of pleasure.  I knew that Rod was still slowly masturbating and watching my cock, and that was a nice comforting feeling, but it was the girls fondling my cock and my underpants that was bringing me to the boil.  How wonderful it felt to be wanking with my cock out through the front of these lovely soft white underpants. In a matter of seconds I said I was soon going to come.  "Ooooh, wonderful", the girls were murmuring excitedly as they knelt by me.  Susan placed her other hand on my soft, white, cotton underpants, and started to stroke my underpants legs, "Come on, Russ, show us how you wank it". That was easy, and I put one hand on my cock and started to wank it slowly.  My other hand cupped my balls through my underpants, and it was absolutely wonderful.  But Susan wanted to do that.  Pushing my hand away, she cupped my balls, saying, "I'll do that".  Then she gasped, "Oooh, don't your underpants feel exciting there," and she fondled my balls in the most wonderful way imaginable.  I was fast approaching my cum, and Val could hardly wait to see that, "Come on, see how far you can shoot," she said, her excitement showing in her panting voice as she fondled my underpants in a most exquisite way.  Her touch was making me tingle all over, and just as Susan said, "Cum over your underpants," it burst from the end on my cock!  I gasped as it landed on my neck and all up over my vest.  And then I groaned as it started pumping unstoppably from my cock in surges and surges.  Gradually it stopped and started to go limp, and I lay back exhausted. There was silence for a few moments, and then the girls murmured how exciting it was before turning to Rod.  I watched him start to wank his big cock again.  It only took a few seconds before he spurted, and came all over the ground.  I was thrilled that he had not spurted as far as I had, and was sure that it had something to do with my underpants!  The girls noticed that, too, and challenged us to a squirting competition the next time, jokingly laying bets as to who could spurt the furthest! We got dressed and the girls became much more confident with us from then on.  It was a truly wonderful experience, and was the start of many regular sex and masturbation games in the woods during that summer. At home, I had a bath before bed.  But it was only when I was choosing a fresh pair of my soft, white cotton underpants to put on that my cock started stiffening.  It was at that moment that I finally realised that my own white cotton underpants really aroused me.  By the time I had pulled them right up, my cock was stiff and throbbing, and the feelings were so satisfying that I knew I had discovered the most wonderful way of being aroused on my own.  Seeing how the two sexy girls had looked at, and had enjoyed fondling my soft, white, cotton underpants, made my favourite underpants even more exciting to me than before.  The erotic sensations to be found by fantasising and wanking whilst wearing my soft white cotton underpants were then far better than anything else since discovered.  Wearing my best white underpants has added enormously to all subsequent sex with women, all of whom have quickly learned to enjoy their soft, sexy mystique, and their very satisfying effects on each of us. Since I discovered Rosemarie's website and her soft, white, underpants, (Palm Underpants), my secret sex life has taken another boost.  She provided a wonderful fantasy scenario for me which each day is a joy to relive. But more recently, while selecting some men's underwear from her Underwear Store Room, Rosemarie discovered that she still had some of her old favourites, these wonderfully soft, Superwhite, cotton underpants.  She promptly called her supplier who confirmed that Superwhite Underpants are still readily available, and she now has a nice selection of them in stock. With great excitement, I immediately bought a pair of her lovely underpants, and since then my underpants wanking has become an art, a physical and mental boost to each wonderful day that bursts forth.  Soon I had to have more of her very special white underpants, and while packing them to send off, she even took some photos of them for me! The very next morning her package arrived! 
I was undressed, and naked, with my cock erect in glorious anticipation, when I tremblingly opened her package.  There, carefully folded with just a hint of perfume, were two pairs of lovely soft white underpants, one size L, and the other XL for those 'special occasions'! I enjoyed a few moment of naked masturbation before I slowly pulled the smaller of the two pairs of underpants up my tingling legs, and soon my throbbing cock was encased in the softness of my new underpants.  I then stood, gently rubbing it while imagining her looking closely at my pure white underpants, studying them, and admiring them with her usual enthusiasm and excited satisfaction!  I imagined her squatting comfortably in front of me.  I could easily see her dark brown stocking-tops and her white suspenders, and when she relaxed her legs I had a nice view of her pure white cotton pants.  (I know that she loves to wear full-fitting, white cotton pants!)  While I slowly stroked my stiff, throbbing penis through the incredible softness of my underpants, I listened to her low, sex-filled voice saying how much she loves looking closely at my new white underpants.  Soon as she started to describe the little seams around the centre of my underpants, and I had to take out my penis very quickly so that I did not make my pants wet.  Then I had a most dramatic orgasm which pumped out my cum for many, wonderful, fantasy-filled seconds.  On and on it went until, finally exhausted, I stretched out on the bed and fell into a wonderful, dream-filled sleep. Ever since that amazing day, my underpants masturbation is becoming even more exciting as new experiences continue to unfold, and as I can now enjoy writing to tell you about them the next story is almost ready to send to Rosemarie for her tidying and editing procedures.