[No one needs tact, anyway. Nick's used to it; his best friend is pretty lacking in the tact department. The question does provoke a slightly surprised grin out of him, though, before it fades.]

Because I'm a Grimm. ...which is what I'm assuming you're talking about, since I actually have showered in the last twelve hours.

[Though granted, he's done a hell of a lot of running around since then. And now he's hoping either this guy hasn't heard of Grimms, or he made a good enough impression not to have him run in terror or try to attack.]