A bad habit
I overheard a friend telling his pal, "I can't break my wife of the habit of staying up until 5 in the morning.""What is she doing?", the pal asks."Waiting for me to get home."

African Marriage
Young Son: 'Is it true, Dad? I heard that in some parts of Africa a man doesn't know his wife until he marries her?

Dad: 'That happens in all countries, son.'