We make vaginas fart all the time.

Definition: Air built up inside a woman's danger zone, that bursts out when movement occurs. This is prominately found when a man "hits it from the back," or "doggystyle." Then the woman moves to another position.
Example: A qwif usually happens while women are thinking of what's going to happen on the next episode of friends, and "did I turn the oven off?", and wondering when this is going to end.