Okay! Ignis... J, N, O, F, I, V?
Any particular continuity?
Do those answers vary by continuity?
I expect Spira and Uni-verse are pretty similar, so go for those. Collarverse is the likely exception.
Well, the answer to J will vary, if only because Spira Iggy is currently sharing a room and Uni Iggy isn't XD
J: (Spira) He tries not to, it'd be rude. When he's getting frustrated, it's dealt with quickly in the bathroom. Washing it down the drain leads to blockages, and he's almost certainly had to explain that to Noct at some point, so he cleans up with a tissue and flushes.
J; (Universe) He doesn't watch porn to jack off, much. Sometimes he does, and prefers still pictures to video because trying to keep a video on the good bit is distracting. He tries not to feel guilty about either bit, but it doesn't stop him feeling like it's a bit wrong. He'd never discuss his habits easily.
N: (Both) Anything involving humiliation. Either him humiliating a partner, or them humiliating him. Hard no. He's not into being called, or calling people sluts, or whores, or the like, and he's not interested in peeing on people, or being peed on, or anything up that general alley.
O: (Spira) Quite enjoys both giving and receiving. Not the most skilled in the world, but he's had some practice at both ends of the spectrum. He likes to think he's not bad at it. He's certainly had no complaints.
O: (Universe) He's a precious Catholic virgin, what do you think? He's never given it, although he's thought about it. Never received it, although he's thought about that too. He'd take instruction well, though, givne the chance.
F: (Both, although it's fantasy based for Universe) On his back, or cowboy/girl. He likes to be able to see. He's not averse to being on all fours, or on his stomach, but he likes attractive men, why waste the view?
I: (Spira, theoretically applies to Universe but he doesn't know yet) He's the sort of person that can't be doing with lying in grubby sheets, so unless someone put a towel down, he's going to be fixing the bed the moment he can. Once that's done and everything's cleaned up, however... cuddling is nice. Talking isn't necessary, but a cuddle is good.
V: (Both) He's quiet. Can be coaxed into making noise, especially if he's receiving, but he's not a screamer. Universe Iggy will be especially quiet unless his partner puts the work in. The idea of other people hearing him having sex makes his toes curl, in the bad way, for both versions.
Aww, Iggy. And yeah, fair. He's a bit precious. ;n;
Nel. T, C, A? Pretend C is spelled properly. Or even starts with the proper S.
Since you asked about Gladio... Erwin, A, P, C.
T: Yes, yes she does, and yes, she does. She can probably recommend some. They're for personal use, but if a partner wanted to use them and they can be properly cleaned, sure.
C: It's not the best tasting thing in the world, but she won't bitch about it. She swallows. Has almost certainly entertained some past boyfriends by letting them jack off on her boobs.
A: Depends on who she's with, and what they did. Boring old peen in vag sex... Eh. If they've been rough with her she'd appreciate a bit of aftercare. A massage, maybe, told she did well, that kind of thing.
Erwin, A: Very, Fucking. Snuggly. His partner is going to get spooned, and squadged. He likes it rough, and makes up for it afterwards.
P: Varies. Fast, hard, and rough is good, but he's not beyond drawing it out nice and slow so that his partner (Levi) bitches at him to get on with it. He's also not above slowing down right at the last second to leave someone hanging.
C: He likes it across his partner's face. On their tongue, and across their cheek. Not in hair, though, that's just annoying and inconvenient. He also swallows.
Nel's sort of sweet, despite being a bit awful. XD
Erwin be careful, don't squash him, he's only little.
Levi is going to be his teddy bear.
Y'ever seen pictures of cats being hugged against their will?
Also Erwin, K, R. Why not.
Am I allowed to combine these into one answer? Because they're nearly one answer.
So... places where there's a risk of being caught are one of his kinks. His office, definitely. Over the desk, or under it, either is good. Places where his partner has a reason to be, but they definitely shouldn't be doing that in them. There's a limit though, he's not about to do it over someone else's desk (no matter what he thinks of Drautos).
He also likes being rough, and demanding, but he'd be lying if he said he didn't get a big kick out of sitting his partner up on his desk and getting his hair tugged while he blows them.
D: He has a few secrets, but they're not dirty ones. More... sad. He's only had one serious relationship. He plays up the aggressive gay as a defensive mechanism. He isn't actually as sexually attracted to everything with a penis as he pretends to be but the reaction is usually worth it.
He secretly wants to try being tied up, and/or gagged/blindfolded, but has never been with anyone he trusts to do that. It's... sad, yeah XD
M: It doesn't take much to turn him on. An attractive, consenting partner is usually enough. He does get an extra kick out of really inappropriate people/places/activities, though. Having Arc Aizen suck him off on his dad's office would be the turn on trifecta XD
LMFAO He's the best/worst. XD
Whew, I'm glad you finished with M, otherwise I would've been left feeling bad for Szayel...