me and my girl only do dry humping. is it possible that sperm can pass through 4 pcs of thin cloth? it wasnt this concerning the last few times we do that kind of activity but this time we have lesser clothes, i was wearing underwear and thin shorts and she as well. after i ejaculated on my undrware.i was on top of her then. as i got off her i notice her shorts was a bit damp on its base. now im getting a bit worried cause if it were mine or hers, that that incident could lead to pregnancy.