Caught Her Cheating with His Best Friend

Two guys are talking in a bar.
“I came home early last night and caught my wife having sex with my best friend in our bed!”
“What did you do?”
“I grabbed my wife by the hair and said ‘that’s it, you’re outta here’ and threw her out of the house.”
“What did you do to your best friend?”
“I shook my finger at him and yelled ‘bad dog! bad dog!'”