A woman pulling her panties down or aside so that you can see the gusset. I don't care how fancy the woman, by the end of the day she's got some kind of trace left behind. Clitty litter, if you will
Anyway- I want to see it. And just as importantly, I want her to show it to me. Not the gross stuff from chicks who don't know how to wipe or use a calendar. I mean just her normal discharge.