So yesterday I was spending time with my boyfriend. I was sat on top of him while wearing only a very thin gstring type underwear-very see through and thin, barely even covering my genitals. my boyfriend was wearing a pair of thin boxers and some thin shorts. After I moved off of my boyfriend I noticed a wet patch of pre ejaculate on shorts and I know for definite it was from him and not me. I'm worried about the pregnancy risk here. I've heard that sperm can get through clothes but I've also heard that it can't. But what if the fluid leaks through the material? Does that mean the sperm has made it through? I'm very very confused. Later that day his clothed penis tip got in very close contact with my vaginal opening (I was still wearing thin underwear tho) Please help. if the fluid has leaked through, do I then have a risk of pregnancy?