I'd pee in her butt!
Maybe I should give a little back ground. My brother and I were drunk one fine evening and a gorgeous girl walked by and I was like damn shes HAWT! and he was like yea I'd pee in her butt. it was the most random and funny thing we probably laughed for an hour (remember heavy drinking was involved). So from know on that is what we use instead if she is hot or I'd hit it or whatever and I found it quite fitting here!