When your girlfriend has a yeast infection and gets you to ass fuck her, then eat the pussy and the ass. You get the yeast roll and the truffle butter on the side.
Refers to taking two good things and combining them into a single thing that it worse than the sum of its parts.
Two goods dont always make a better thing, like taking Nutella, and Steak, they are both great, but combined, that Nutella Steak is not really any better than just eating the steak by itself