Weird things the chocobros find attractive or weird things that turn them on ?
Noctis gets weak for little flashes of underwear. A bra strap, a peak at some boxers, whatever He has no idea why but it makes him ansty and more than a little horny.
Also, if they’re good at arcade games. especially if they have an excellent concentration face. All he can think of is that face as they… well… you know.
Prompto has a thing for hands and necks. A nice contrasting choker around someones neck makes his breath a little short and he could spend all day watching someone with a lovely pair of hands. It’s a pity Ignis wears gloves, and also a fucking blessing.
Gladio loves freckles and moles. Little scars or blemishes. He has no idea why but he really loves little unique quirks that makes a person stand out. It’s more than piercings and tats, but signs that you’ve lived your live and had a good time even if it’s paper cuts on your fingers.
Ignis cannot resist accents. Whether it’s bold and really distinctive or subtle until you get tipsy or passionate, the way you say words draws him in. Go ahead, purr something in his ear in another language, something filthy or something perfectly tame and he’ll blush. I promise. Do it.