Sirius: James, what if your baby is a centaur?

James: What?

Sirius: I'm just saying, what happens when an animagus has a kid?

James: Well I'm a stag anyway.

Sirius: You know what I mean!

James: Shut up Sirius.

*Much Later*

James: Lily are you awake?

Lily: What?

James: You'd be able to tell if our baby was stag, right?

Lily: I can tell he's half an idiot.