Tony makes an extravagant show of rolling his eyes, even as the word sub makes him pause for a heartbeat. That's what this is, and he knows it, but something about having the actual word submissive out there feels...off. Unsettling. Stark men are made of iron.

He pushed all that to the side with a wrench of mental effort. More things to pick apart later. Really, this entire thing was giving him more insight into his own mind than most psychologists he'd ever seen. Whether or not that was a good thing remained to be seen.

"Defining the relationship, smartass," Tony says dryly, as if his brain isn't whirring away at ten other things. "Fuckbuddies is fine, but is this monogamous? That kind of thing."