Cream

A guy walks into a bar and orders three whiskey sours, drinks them down BAM! BAM! BAM! Then he orders three more. The bartender's having a slow night and appreciates the business, but is also concerned.

"Hey buddy, slow down. What seems to be the problem?""

The guy answers, "I went on a week-long business trip, and had to leave
my wife alone. I've had my suspicions about our next-door neighbor, so
I hung a weight from the bottom of the bedspring just above a bowl of
cream."

The bartender nods sympathetically and pours the guy another. "So you
came home and found cream on the weight?"

The guy downs his fourth whiskey sour and says, "It's worse than that.
The cream had been churned into butter."