Beer
A man and his wife go into a small bar, and are having a couple of drinks, when the man's pager goes off. When he goes to the phone, a lounge lizard comes over to his wife and says, "I'd like to turn you upside down and fill your cunt with beer, then I'd drink it all and burp in your pussy and get you off."
The man looked over and saw the husband coming back, so he took off. The woman told the husband what had happened and asked him to go punch the guy out. The husband replied, "I'm not fucking with a guy who can drink that much beer."