Back Fart

The sound of a back fart is made in the following way: Two naked people lie back to back and press the arch of their backs together, pushing the air out and creating suction between the backs. They then move apart, causing a release of the suction, which creates a loud, often disgusting, fart sound.

In lighthearted moments after making love, Mo and Sally enjoyed a session of back farting before dozing off together.
Mo: Oh, Sally! That was great!
Sally: Yeah, Mo. But you know, it’s not complete without a session of back farting! It's my favorite!
Mo: Okay, get into position!

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