When I was 15 I had a friend called Jacob who was 14. One school holidays I went to his house where we planned to go out camping for a couple of nights with another one of his friends (Daniel). When I arrived it was late afternoon so we set up the tent and lit a camp fire. We were sitting around the fire and Daniel was spending a lot of time looking at his mobile phone. Me and and Jacob suddenly noticed that he had his hand in his pants and was wanking. He saw us staring and just said 'What don't you ever do this?'. I said yes but Jacob said he didn't.
After teasing Jacob a little bit we decided that we should all wank and see who could cum first. That was how we would teach Jacob to jack off. So we all stuck our hands in our pants and started wanking furiously then after about two minutes, Daniel proudly told us that he had cum. We didn't believe and told him to prove it. So he stood up undid his fly and pulled his dick out of his briefs for us to see. And sure enough it was coated with sticky sperm.
He suddenly looked embarrassed and quickly stuffed it back in his underwear. I kept wanking and soon felt my sperm shooting out soaking my briefs. I pulled my hand out and wiped it on my pants as we watched Jacob tense up and experience his first ejaculation.
For the rest of the camping trip we frequently wanked but never took our dicks out. I wonder what our parents must have thought back in those days as they washed our stained briefs. As we would often wear the same underwear for three or four days while cumming in them at least a couple of times a day. That coupled with the fact that on those camping trips we would usually forget to bring certain basic necessities such as toilet paper would have made our underwear quite fragrant.