Leftovers?
I guess you just have to taste it, and find out for yourself...
On a more serious note, needing a little vajayjay touch-up is fairly common, which is why even glamour nude photographers should have handi-wipes available on set. I try to take a peek in advance to ensure there is no girl goo or other stuff that might appear in the pix (unless called for in the storyline), since girls sometimes miss things.
ADG