1. when a man farts in the womans face then jiggles his penis in it and uses it as a fan to spread the fumes around. If the man shits then it becomes a Sack Attack.

2. When the man in a relationship jiggles his balls sack on the hood of his womans car.

3. When your door bell rings.

When you're being horny (especially around friends) and as a result shame ensues.