Robert Altman‘s The Long Goodbye (’74), 4:03:

Marty Augustine (Mark Rydell): And I understand you…you’re nervous.
Phillip Marlowe (Elliott Gould): I’m not nervous.
Augustine: Yes, you are. You’re nervous like I am. When I was a kid in high school [and] I used to dread gym class. Absolutely dread it.
Marlowe: Why was that?
Augustine: Because I didn’t have any pubic hair until I was 15 years old.
Marlowe: Oh, yeah? You musta looked like one of three little pigs.

Kim Morgan, Elliott Gould outside the New BevMonday, 1.30.23.