For sure lipstick on your cock has to be a worse situation to explain
I encountered this when I was in Hamburg last year, got OWO off a hot young German rock chick prossie who left my cock smeared with her pillar box red lipstick, I'd had a few beers, so wasn't paying my usually maticulously high standards to cleaning myself up with a babywipe.
Anyway, later that night, I pulled a young frauline in a boozer, went back to hers, got naked and I noticed the red smears up my cock. She didn't ask too many questions, although did make a joke about it, so think she knew the score, but carried on regardless.
Not a bad evening actually