Really proving your point here.

[He remarks, unable to and honestly not wanting to hide the dryness from his voice. Yeah, so what, he can still be a shit to people about this sort of thing, even if it's important to him.]

But, really. Even if most people can control it, doesn't mean everyone can. At that point, you just try and learn the extent of your powers, control what you can, and do what you can from there.