The first time she did it, she came over to drink wine and watch a movie.
When she called up to let me know she was outside ( I live in a gated community) I told her I was gonna be a few minutes because I had just stepped out of the shower.
So she knew it was gonna be clean down there. I did anticipate it a bit because I told her I just shaved my penis and my dick looked like a porn star dick via text earlier so luckily I cleaned everything well down there. I knew she was gonna spend a lot of time playing with my freshly shaved balls

the ass licking was a bonus!
Anyways, now I always clean up down there when I know im gonna see her and im sure she does the same.
if you guys out there have built enough rapport with one of your chicks, I highly recommend a little bit of ass play and see how she responds