Ok so long story short. So I went out clubbing with some friends and went to the dance floor where i started talking and dancing with this cute girl. She had the biggest bounciest booty I've ever seen with her body size at least. She started grinding me and believe me she knew hot to dance and move that butt. It felt amazing her grinding on me and i love to dance, so I was having the time of my life. Unaware did i know my pants zipper was undone and my cock was dangling though it hard as a rock rubbing all over this poor girls big butt. I dont wear underwear because I had a sperm deficiency a year ago and this seemed to be a method that worked for me. Anyway so after I realised I asked the girl if she wanted to go get a drink and chat (Just so I could put my cock away safely and avoiding a "Theres Something About Mary" moment LOL. When I came back from the bathrooms her girlfriends were like looking at her butt saying what is that all over your booty (She was wearing black dance tights, so it made it more obvious), Her butt was covered it pre-cum (from me). They didn't realise but man I felt nervous and uncomfotable the whole night. I might be exaggerating but It was almost as if 5 guys had cummed on her pants. I felt so bad.