A guy wore my skirt for a dare, completely naked! I love the skirt though. But the guy got pretty comfy in it. He had to give someone else a nasty lap dance and he went full on board with it. (i'm guessing she's thinking of her pants fate as well ;) ).
Personally I would not wear it again even after being washed, but after washing it I'm sure nothing will happen if you choose to wear them. Most dryers go to temperatures high enough to kill most germs.
Something bad probably won't happen if I drop food on the floor and then eat it but that doesn't mean I want to do it. Something bad probably won't happen if I decide not to wash my hands but that doesn't mean I shouldn't wash my hands. So I don't see how it's childish.
Are you like 12 or something it seems so childish..im assuming the guy is ugly and dirty.thats why YOU want to throw it away.just wash it an tell her to do the same...when you soil your panties with your juices you don't trow them away...your not fonna die just because a guy wore your cloths