I think Ignis is more into office/car sex for his naughty side. I can't stand pet play or too much bdsm so I'm super biased here, but it's not unthinkable for our dear Iggy to get off at the prospect of fucking where he works. Especially if it's on a meeting table. All those snotty politicians talking at a table that he literally rocked a couple hours ago. He grabs his own thigh to get his mind on track and not pop a boner.