A woman hears a knock on the door and when she opens the door a man asks this.

Man: Do you have a vagina?

Woman slams the door in disgust

The next morning she hears a knock again and answers the door. The man asks the same question Man: do you have a vagina?

She slams the door again.

Later that night when her husband comes home from work she tells him what's happened the past 2 days. The husband says in a concerned voice "Honey I'm going to take the day off work tomorrow and stay with you incase that creep shows again". 

The next day there is a knock at the door again, both the husband and wife rush to the door, the husband whispers " I'm going to hide behind the door, if he asks the question again say yes because I want to know where he's going with this" 

The man asks again " do you have a vagina?" Woman answers " yes actually I have a vagina, why? "

The man replies " oh wow good! That means you can tell your husband to start using it and leave my wife's alone!".