My g.f. likes to wear my boxers to sleep in and wear around the house (she looks sexy as hell in them). Most of them are black or dark, so its not really noticable, but on some of the lighter colored ones theres blood stains from where my ass bleed from injections. The other day she asked me why theres stains near the ass cheeks. I said I've been helping my friend build a deck and might have sat on some nails or something. Would have said that they're skidmarks, but they're not near the crack. I thought it was pretty funny.