"Fuk, that was good, babe." The way he's heard it used by humans, the word as an endearment doesn't mean anything all that specific. He should say something, after all. He's not really worn out, but Mort clearly is, and he's not confident about more pheromones. He'll wait. "Wake me when you're ready for another." How long has it been since he's been able to share a bed? Be held properly while he rests? Some of Sujuno's crew would let him lie next to them after they rolled off him. Not the same.