"If you find your wife in bed with another man" joke

A guy was trying to console a friend who'd just found his wife in bed with another man. "Get over it, buddy," he said. "It's not the end of the world."
"Yeah, it's easy for you to say," answered his buddy. "But what if you came home one night and caught another man in bed with your wife?"
The fella ponders for a moment, then says, "I'd break his cane and kick his seeing-eye dog in the ass."