- Is it your confidence? Are you nervous about your penis?
- Uh, what?

7 seconds sound clip from the The Wedding Singer (1998) movie soundboard.

You can hear this line at 00:56:29.454 in the Blu-ray version of the movie.

Quote context

[...]

- Hey, you guys, you know what would be fun? Let's all go on a double date.

- Okay.

- Sure you know what you're doing up there?

- Don't worry. You've got to stay in shape so other men will look at you. That way, your husband knows you're still attractive.

- Yeah, well, just don't drop a dumbbell on your head.

- So you still haven't been dating anyone new, have you?

- No, not yet.

- Is it your confidence? Are you nervous about your penis?

- Uh, what?

- Are you nervous about showing a new girl your penis? You were comfortable showing it to Linda, but now you might have to show your penis to someone new.

- What's the matter with you? Don't talk about that.

- You know, I was at your bris when you were a baby. And I saw it. It wasn't huge, but it had some size.

- Don't worry about it.

- I'm not worried about it. Next subject, quick.

[...]