Whiskey sours

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 apprec- iates 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 neighbour, 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."