It seems as though when I am sexually active, after a period of time, I have a small hair around my nipple that turns black. But when I go a while without being active, it goes back blonde...of course I pluck it a lot. And I remember watching manswers and they claimed that a man's saliva turns a woman on due to the testosterone that is carried in their saliva. I'm not sure how reliable manswers is but I figured if testosterone is being applied topically to my breast everyday, possibly that is why it turns black? I've never asked a question online, I've always been able to Google and get my answers but I couldn't find anything on the subject anywhere. Help...its so embarrassing. I feel so manly right now.