My Best Friend
The sympathetic bartender asks, "Any thing you want to talk about?"
The depressed man replies "Well for the last couple months, I suspected my wife was cheating on me. So today, I took the day off work to follow her. When I came home for lunch, I caught her screwing my best friend."
"Wow" replied the bartender, "If you don't mind me asking, what do you say to your best friend in that situation?"
The man replied, "Well I looked him right in the eye, and I yelled, BAD DOG!!!"