"I might eventually shift to that if I manage to stop feeling like I would be wearing the clothes of a very different culture who's clothing practices I am unfamiliar with. "

"You go around looking very fancy."

"Appropriately so, I hope?"

"Eh, you stick out but not in a bad way?"

"Probably I would prefer to have the option to not stick out by default but not at the cost of switching my wardrobe immediately. There are a lot of other things that seem more important to get used to than clothing." 

"Like what?" Like all this exposed Lucien skin he could be petting?

"Li-" oh he is squirming now "- mm."

And nibbling on and kissing?

"-oh-mmm-"

"Mmmm did you say something?" asks Haru innocently.

"no-o..."

"You sure?" Nibble.

"ye-MMmMmMMmmm!"

Ooh, a good spot, he'd better keep in mind where that is. He will have to affix this information in his brain firmly somehow. Possibly by repeated exposure to that noise.

Does being clung to help with committing it to memory?

Yes. Yes it will.

Well in that case Haru can be clung to and squirmed against.

Does Lucien still want to be wearing underwear, or perhaps it should be called meta-underwear?

Lucien is going to bite his lip and then nod about this.

How agreeable of him.

Lucien isn't wearing any clothes and a man is looking at him and apparently this is actually enough to make Lucien make a face all on its own.

A face like that must be kissed.

Lucien hums happily into the kiss.

And pantslessness also improves groping. How about that.

Lucien's amount of clinging at this point is sort of giving the impression he is (happily) drowning and Haru is a floatation device.