A man walked into a bar and ordered a beer. He drank half and then poured the rest on his hand.

A few minutes later, the man ordered another beer and the bartender became suspicious. Again, he drank half and then poured the rest on his hand.

A short while later, the man ordered yet another beer. The bartender finally asked, "Excuse me, sir, but what the heck are you doing?"

The irritated guy replied, "Can't you see that my date and I are trying to have a drink?