I have seen my friends' cocks many times but accidentally the time I remember the most was
Once I was on Facebook, the posts began to seem somewhat far from my tastes, so I overload and the first thing I see is the profile picture updated a moment ago of my best friend, it was a completely naked black and white selfie, he was holding the cell phone with his left and his erect penis on the right, in addition to the fact that being in profile the shape of his butt was visible. His cock wasn't huge, at least from what it looked in perspective, but it was very good.
He deleted it instantly, I hope to be the only one to be able to see it, I took a screenshot of it (he doesn't know) and I asked him by Messenger what that was, he didn't want to give me many explanations but he said that he was trying to change his photo and by mistake he selected that one and that he instantly changed it and published it, without even giving him to accept
I saw the photo often, although unfortunately it was lost recently, but I could still see his penis on other occasions, although in greater confidence and it would not go in this thread anymore