I and my boyfriend have sex so that he ejaculates inside of me. A couple times (not many) I've had this wet spot on my underwear although I've washed myself afterwards pretty good (the semen must have been so high up in my vagina that it liquefied before I could get it off). Some time ago I went out shopping for some new jeans and tried on some pairs in a store. I wore them max. two minutes in the changing room. When I came home there was once again this wet spot! And it was quite huge one at that. What I'm scared of, is it possible for someone else to get pregnant If they tried on those jeans after me if there was some semen left behind?