His vessel is happy. Irritating.
His vessel has been fighting. Too easy a fight, but he lets himself be swept into it anyway.
His vessel roughhouses with that one who tried to escape them once. He adds some fang to those play-nips. (the boy shudders, a little, unconsciously.)
His vessel prances for that weakling bitch. He nudges some more pride in those smiles. (the girl smiles back, and then pretends she didn't, badly.)
His vessel is horny.
Kyuubi allows himself to be swept in it, drop by drop adding the weight of his own need to the wave, until his vessel is the one swept along by the undertow.