A fly lands on a slice of bread, walks around as if it lost a couple of germ buddies then flies off.
Guy flicks off a few crumbs then takes a huge bite out of it.
Girlfriend: EEEEEEWW, you have no clue where that fly has been, you can get diarrhea for days babe!
Guy: (whilst licking his fingers) I have no idea where "you" have been, and there is no telling what i can get or for how long! And you're still my munckin!