[Trustworthy to the end. If he could smile he would, but things being as they are he starts purring instead. There's a long silence from him in which the pulsing vibration of his vocal cords only increases in volume, before he finally comments on it.]

... That's involuntary.

[Augh.]

Don't over-explain it. Tell him I'm a stray you felt sorry for if it's easier. Fugo has enough to deal with.