hi ok some sperm can be in pre-cum but with all that clothing on it would have to be some real kind of magic sperm to get through all that. i think we could say your safe. look if your getting near sexual activity. and it sounds like it could happen soon then its time to find some bc like the pill. but please just keep away from depo shot just to many side effects just remember this safe sex is the best sex. good luck
can you get pregnant the boy goes ontop in his boxers and he pre cums and you only have an underwear and a panty liner