Season 7, Episode 16: "The Shower Head"

Wait. What are you gonna do in there?

What am I gonna do in the bathroom?

You gotta do me a favor.

-Elaine, I really have-- -Hold on a second, Mrs. Seinfeld.

I need your sample.

You want my urine?

I need a clean urine sample from a woman.

-I don't know. -Oh, please, Mrs. Seinfeld, please?