And this is where commitment part comes in, Thanatos supposes. He hasn't really thought of it in these terms, but he also has no experience to draw from. Maybe he should have tried researching this?

"I would like it to be long term if possible. It seems foolish to test out something that would only be short term." Then he falls silent to think. Thanatos's next answer doesn't come as quickly because it's something he's thought of even less. (Not too long ago, Thanatos realized he was romantically interested in someone when before he thought he had zero interest at all.) "Did you not want to be exclusive? If there's someone else you like, then I won't stop you."