Some see it as rude and some are simply not receptive to it. Or to the idea of speaking with a human at all. Suho is none of these things. He's only too happy to speak with the human and answer his questions. Granted, that's the type of behaviour that got him all mixed up with the princess earlier, but there's no harm in being friendly and helpful this time!

Suho claps his hands again and nods rather enthusiastically. "Yes! Yes that's right!" Though all the enthusiasm seems to drain away when he sees the human's (new friend?) concern. But then he laughs and waves one hand a little dismissively. "He's okay! He's just asleep and it's best to not wake him up unless you want to get snarled at."