Usually used while testing the limits of a girl.
man: "So baby what do you think about a threesome tonight?"
girl: "Are you kidding me!?"
man: "Obviously I'm kidding with you, you are the only girl I want"
JUR Example 2
girl: "Sorry honey we can't have sex tonight its that time of the month..."
man: " Well looks like we will just have to do it in the butt ha ha!"
girl: " I guess we could try"