White cotton underwear on girls and guys drives me crazy and has been my primary source of masturbatory fantasy since it all started with my first girlfriend.
One party had 20 or so thirteen to fifteen-year-olds making out in someones basement listening to music with the lights dim. As the party progressed so the did the hormone level of the group. Up till then my hand was the only one to ever touch my cock 'that' way. I was fourteen and my girl was thirteen. She was sitting on my lap and we were making out and pretty well oblivious to the group. Whenever I would look around, mostly to see if we were being stared at, others could be seen with hands up shirts and tongues deep in mouths. It was very exciting.
I had slipped Ann off to the side of my lap so I could feel her braless perfect small tits while we kissed. At one point I felt her hand on my pants seeking my penis. She found it and began to explore it through my jeans. My cock was rock hard and folded down my leg and hurt like hell but this moment in my life lasted forever, when to my amazement her hand found the top of my pants and entered between my jeans and my briefs. Finding my aching hard cock she fidgeted it around until she had it up against by belly there resuming her somewhat clumsy caressing.
Looking around in fear I saw the others all doing the same. Some of the girls had undone the pants of their boys and were openly massaging and even masturbating them through their underware. Some even had their hands inside. By now Ann had my pants open and her hand in my underpants with her hand wrapped around my boner. I had my hand covering hers in my briefs in an attempt to conceal what she was doing while finding it helping to show her the gentle action that would help me. I could even detect the smell of sex in the room as the assault on the cocks of the boys continued.
My hand on my arm around her back was now deeply down her pants massaging her pussy separated only by her wet cotton panties. I was probing her holes with my fingers pushing the material in gently while rubbing what I could. I could feel the coolness of precome soaking my underwear as her masturbation of me went on. Others were watching others and everyone was starting to get very close to cumming. I looked over to see that Toni was watching Ann's hand in my underwear when I started to cum. She pulled down the front of her boys briefs in time for him to squirt on his belly and her hand. She wiped up with his underwear and let then snap back up. This all happened while I was shooting for Ann in my own pants.
During the next few minutes everyone finished up and the room changed to laughing and talking. The odour of semen was strong as pretty well everyone had some somewhere on them. My pants were wet with cum and I will never forget that evening. I went with this girl for a year and a half and there are many memories from those times and all had our underwear in them as they NEVER came off. I guess we were just being 'good' kids.