Billy: Oh. Are you s-supposed to be a biker or something?

Mervin: Something along those lines, yeah. Got the idea when a buddy of mine told me to look after his motorcycle. Pretty cool, right? They'll love me at the party!

Billy: Y-yeah, you look... great.

Mervin: Well, yours isn't much better! What are you even supposed to be? A kangaroo?

Billy: Look, this costume was from an old friend of mine, ok? I wear it as a way to remember him. It's more subtle than that leather couch of a diaper you have on.

Mervin: Eegh! Hey, nobody's supposed to know about that, remember? I told you if anyone asks to say that these are just some shorts I modified because the motorcycle seat was missing!

Billy: Don't know if you using it as a bathroom will help your cause, but I won't stop you, Merv.

Mervin: J-just, don't say anything, ok? I'm already going to have enough trouble keeping your costume's stupid tail off the ground, so be greatful I even agreed to give you a lift.

Billy: Fine by me. (How many diapers does he have on under that thing? Five? Hope his hooves can still reach the pedals. My costume's pretty well padded so I shouldn't be *too* banged up if I fall off. Thanks for thinking ahead, Ozzy.)

Billy also diapered version: https://www.furaffinity.net/view/37461549/