Chandler: So Zack's pretty nice, huh?
Monica: Yeah, I guess.
Chandler: So how would you like to have a baby that's half yours and half his?
Monica: Excuse me?
Chandler: Well, we're talking about sperm donors, and Zack may be the guy. I mean, look.
He's intelligent, he's healthy, he's athletic. I mean, he's sperm-tastic!