When I was 16, my friend Brad came up behind me while a bunch of us were hanging out in the hallway next to the gym at school during lunch. He pantsed me, meaning to just pull down my jeans, but my boxers came down too and my penis was exposed to all of my friends there (including my gf at the time). It was pretty embarrassing, but mostly because there were like four girls there. All of us guys saw each other naked during gym anyway, so it didn't matter. lol