My boyfriend and I were fooling around one day and i was naked but he had underwear on. We were just rubbing against each other. And he slipped and i felt his penis down around the entrance of my vagina. It never once fully entered my vagina but it felt like if he thrusted forward it would of been inside of me. There wasn't any wetness on his underwear that indicated that he came but i am worried that maybe some left over sperm was there and managed to enter my vagina? Is that possible? Can sperm travel through clothes even if it was on my vagina lips just for a second? Remember he WAS wearing underwear and i was naked.