Double Whammy

A man is looking for a Christmas gift for his wife, and after walking through the mall for hours he gives up and goes to the bar. He sees a friend of his sitting at the bar. He goes over to him and says, " I will buy you a drink if you can give me some ideas about what to buy my wife for Christmas." His friend replies, "I got my wife a pair of slippers and a vibrator." He looks at his friend all confused and asks why. His friend explains that if she doesn't like the slippers, she can go fuck herself.