Cunning Linguist

This guy walks into the bar and sees a gorgeous redhead sitting on a bar stool all alone. So the guy sits down next to her and pulls a small box from his pocket. He opens it and there's a frog inside.
The redhead says: "He's cute, but does he do tricks?"
The guy says: "Yea, he's a cunning linguist."
So after talking with her for several minutes, he convinces her to come with him to his apartment.
They get there and she takes all of her clothes off, gets into the bed and spreads her legs. The guy sets the frog right between her legs and it just sits there not moving at all.
The redhead says: "Well? What's up?"
The frog still does not move. So the guy leans over to the frog and says: "All right, I'm only going to show you how to do this one more time!"