This only happened twice
A few years ago, whilst playing for a football team I really liked I had a friend called Carl. Carl was a great friend of mine and we had known each other for years. One day after our game another friend of mine, Mike had his mum gave us a lift to his house, but she had to go out as Mikes little brother had fell down the stairs and twisted his ankle or something, they went to the hospital.
When we got there, we were all exhausted, I mean real tired we had played a county cup semi final and narrowly won 5-4 the sweat was still dripping from us.
We decided that we would each take turns in the shower as we had spare clothes from before the game we hadn't worn. I showered first, then Carl then Mike. Carl and I were drying ourselves in Mikes room, we carefully maneuvered the towel so we would expose our cocks, but then we remember something, Mikes hot sister.
She had only recently moved out, but a lotta her stuff hadn't been moved yet. In only our towels around our waist we snuck in her room to see what we could find.
Carl quickly found her underwear draw, and discovered G-strings and thongs pretty quickly. We threw them about, whispering about what we'd do to her. When Mike walked in. Shocked, he demanded we hand over the thongs, but we kept throwing them about so he got mad and tackled Carl to the ground.
They began to wrestle and their towels slipped off! They quickly stood up and re attached their towels and while I was laughing I noticed they were both super horny. Mike quickly blurted out 'Wanna Jack off?' We all agreed, anxiously pulling off our towels we compared dicks, mine and Mikes were the biggest and we started to Jack.
Mike let us hold his sisters things while we jacked off and Carl quickly came on her thong. Surprised by this I began to jack quicker, as did Mike. Carl became tired after that and he decided to just lay on the floor while me and Mike blurted out to each other how we'd fuck his sister.
Carl began to shut his eyes and when me and Mike were ready to blow we joked around and shot our load all over Mikes chest! He was covered in it, we even made him lick a bit. But he was pissed off really.
That only happened once, the other time we did something like that, was a cock comparison that me and Carl did a year earlier.