John bought his new colleague, Peter, home for dinner. As they arrived at the door his wife rushed up, threw her arms around John and kissed him passionately.
"My goodness", said Peter, "and how long have you been married?"
"22 years", replied John.
"You must have a fantastic marriage if your wife greets you like that after all those years."
"Don't be fooled! She only does it to make the dog jealous."