[ Alberto nods in understanding, taking this surprisingly seriously, no jabs or jokes at Katsuki's expense. He just turns his attention back on the pants in hand. ]

Okay, then. So. I like the snappy things. Your tail can just come right out. My dad used to use buttons — which are fine, but, eh. These are easier. After Luca showed up, I tried the black — [ he makes a scratchy noise by sucking his teeth, emulating peeling something in two with his hands — his best impersonation of Velcro, for which he's forgotten the word... ] — scratchy stuff for a while. That also works well, better than buttons, but it feels weird on our scales. It'd probably suck with your hair, too. So these little snappies are the best, I think. I'll give you some. We've got a ton.

[ Even if his terminology is not so pro, his tone is tempered and thorough, taking this task seriously. For all Alberto's many mistakes and messes, the kid does have a surprising amount of knowledge — stuff like this that one wouldn't expect, that he can just whip out authority on from his back pocket. Nothing he does is ever so polished, and his sewing knowledge is no exception, but, in fairness, as he snaps the fasteners on the hidden seam back in place, someone really wouldn't notice there's a secret hole in these pants if they weren't looking for it. The things Alberto needs to know how to do well, he does well. ...Well... sometimes. Some of it. Usually. Results may vary. ]