When a guy puts his cock in the girl's mouth, and the girl puts her pussy in the guy's mouth, so they're on top of each other.
When you wanna have double action, try 69ing.
The act of having simultanious oral sex. a 69 can be when 2 males suck each other, when 2 females eat eachother, or when a man and a woman suck AND eat eachother.
My mom always told me not to talk when I had my mouth full, so when I am 69ing, I just sit back and relax.