They dim the lights and do the deed. The whole time she’s moaning and shouting: "Fuka ana!" She seems really into it so he goes all out giving it to her all night long.
The next day he goes to a golf game with the Japanese executives. He makes a very nice chip shot then decides he’s going to try to impress the executives. He shouts: "Fuka ana!"
The linguist then turns to him and says: "No that’s the right hole."