You have to go. It's part of the final.
4 seconds sound clip from the Fast Times at Ridgemont High movie soundboard.
You can hear this line at 00:13:58 in the Blu-ray version of the movie.
Quote context
[...]
- Okay. Can I ask you something and you promise not to laugh?
- Sure.
- Okay.
- When a guy has an orgasm, how much comes out?
- No, I'm just kidding. Just practice.
- You have to go. It's part of the final.
- I hear it's really disgusting. Do you know what they do? Have you heard?
- What?
- Well, the bodies are dissected and Mr. Vargas pulls out parts of the dead body and holds them up.
- You mean, he reaches in and pulls this stuff out?
- Like stomach and tumors or something?
- Yeah, stomach, tumors, entrails.
- Good day, everyone. My name is Mr. Vargas.
[...]