Humor needed

I go up to a man and a woman and start talking to them. Then I say, "So are you guys boyfriend and girlfriend, married, or what?:. He replies, "I don't know. After today's fight, she might be throwing me out on to the street." She says,, "Oh shut up." I say, " You guys sound like a married couple. So let me make this simple for you. If an attractive girl like myself invited you for a quickie, no strings attached, would you accept?" He says, " No." I say, "So you guys are boyfriend and girlfriend." She says, " He's joshing you."