The Chinese Woman Season 6, Episode 4

Jerry

Really? You never slipped one past the goalie in all these years??... Boy, I'm surprised. You've slept with a lot of women!

Kramer

A LOT of 'em! (wild gesture, freaked out) Do you think maybe I'm... Depleted??!!

Jerry

Well, I'm sure you're not... Totally Depleted.

Kramer

Yeah but what if I am? I'm the last... male Kramer! We're facing extinction!

Jerry

So go to a fertility clinic. Have your sperm count checked.