Well, what's wrong with theory?
3 seconds sound clip from the Forbidden Planet (1956) movie soundboard.
You can hear this line at 00:46:51 in the Blu-ray version of the movie.
Quote context
[...]
- Then why don't you kiss me like everybody else does?
- Everybody? Hasn't your father taught you anything at all?
- Ology?
- Of course, that's... That's mostly on the theoretical side?
- Oh?
- Well, what's wrong with theory?
- This.
- It's all right, he's my friend.
- I'm... I'm sorry, Alta. I... I had to do that.
- But he didn't recognize me. He would have killed me. Why?
- You really don't know, do you?
[...]