when you use your penis like a knife and scoop some butter with it then smear it on someone's anus and then have anal sex with that person useing the butter as a lube.
Doug went out with Smeegal last evening and he said that he was butter in the buns before they went out for dinner and a romantic movie.
PEANUT BUTTER WHISTLE, IS WHEN YOUR FINGERING A FEMALE WITH 2 FINGERS AND YOU MAKE HER LICK IT ALL OFF! ( YOU USE TWO FINGERS TO WHISTLE SO IT LOOKS LIKE SHES GETTING READY TO WHISTLE WITH THOSE FINGERS).
I STUCK MY 2 FINGERS SO DEEP IN KHIAS ASS THAT MADE HER ALL HOT AND HORNY. SO SHE GRABBED MY FINGERS AND GAVE HER SELF A PEANUT BUTTER WHISTLE!