Do you believe that people ever pick up animal hairs on their clothing?
Of course not!
Except at my house.....or my moms house....or the vets office....or a neighbors house. :-)
Sure, I usually look like I need to be vacuumed. But I pick it up from the furniture. If a hair falls from your scalp, and lands on the bathroom floor, it will not just defy gravity, blow up into the air and work its way through clothing, especially spandex, into someone's pubic area. If someone sets their jacket down on the floor for lack of a place to hang it, it surely could pick up a hair, but that isn't likely to end up in someone's pubic area.