Yes. Yes, I do. When I'm hungry.
5 seconds sound clip from the Superman (1978) movie soundboard.
You can hear this line at 01:47:56 in the Blu-ray version of the movie.
Quote context
[...]
- How big are you? How tall are you?
- Hm. Well, I assume, then, that the rest of your bodily functions are normal?
- Well, putting it delicately... do you eat?
- Yes. Yes, I do. When I'm hungry.
- Well. Well, then, is it true that you can see through anything?
- Yes, I can. Well, pretty much.
- And that you're totally impervious to pain?
- What color underwear am I wearing?
[...]