Here's Niall wearing a latex cowboy outfit. For no real reason, but since he's an incubus he doesn't really need a reason. This was done, and done very well, by GothyCollie.
The idea owes a lot to this piece by MilkAndJuice/Lettuce: https://www.furaffinity.net/view/53941310/ Rubber cowboy outfits were something I'd not thought of until that moment, and I figured Niall would be a good test subject.
Art by gothycollie on FA/Twitter/Bluesky and I'll link to their original when it's posted. EDIT: https://www.furaffinity.net/view/54516190/