Husband: Look dear, I just bought us one of those plug in air fresheners. But for some reason it's not working.
Wife: It's not plugged in.
Husband: You mean I have to plug it in for it to start freshening the air?
Wife: It's a plug in air freshener. How can it work if you don't plug it in?
Husband: It makes no scents!
MORE WAYS TO LAUGH