My cousin and I both reached sexual maturity relatively early and when we were 18 both of us were still virgins. Having had a conversation about this when we were staying at his house we got onto the topic of penis size. Eventually one thing led to another and we compared. He showed me his and no word of a lie he was a minimum of 10” I was probably 6” at that age.

Without even thinking I put my hand on it and he moaned, I started to jerk him off and then he said shall we try sucking each others. I said yes as it seemed like fun. Eventually he came in my mouth, I couldn’t finish in his so I asked if I could put it in his bum. He agreed and after applying a lot of lube I managed to get into a good rhythm and cum inside of him!