well, myu penis will continue to leak after sex. so it is very possible. And besides how many guys wipe all the semen off after they remove the condom? I would imagine most men just put their underware back on.

Whats really scary is I once saw this item being advertised on a christian website. Its purpose was to determine if you child was being unpure and mastrubating. I might have been a joke site, but you never can tell with extremists.