Yu Yu Hakusho1992

Yusuke Urameshi:
[laughing hysterically as he stands before the toddler who runs the universe] And to think I was scared of the mighty King Yama.

Koenma:
Well, to be more exact, I am the mighty Koenma, and I am the son of King Yama. Even though I appear to be a child, I've been around over fifty times longer than you have, so watch your mouth when you speak to me.

Yusuke Urameshi:
[still laughing] So it takes hundreds of years to move past a diaper.

Botan:
[punching Yusuke over the head] Can't you show an ounce of decency?

Koenma:
Actually I'm proud to say that in addition to knowing the greatest secrets of the universe I am also quite potty trained. Now let's skip to the business, shall we?