"Leprechaun"

When John saw that Leprechaun, the little guy said “Since it’s Saint Patrick’s, I’ll grant you a wish if you let me screw your wife”. John accepted after hesitating. When the Leprechaun was doing so, John said “I can’t believe I’m getting a wish!” The Leprechaun replied “I can’t believe you thought I was a Leprechaun!”