who is TG would just go around through the day waering a butt plug

Nico always does. He has a vast collection and gives you hints to guess which one he’s wearing, not subtle nor shy and uses it as a little incentive for you.

Hide loves teasing you by wearing toys underneath his closing and telling you to guess, nipple clamps, cockrings, plugs, and whining about how much he needs you.
If you get it right he’ll let you have you way with him in the nearest bathroom or broom closet~ if not he’s pulling you home as soon as possibly even more eager than you and whining

Uta is used to doing things like this of his own accord just to give himself a little extra through the work day, and with his s/o? he’ll be sitting quietly at his work stool and mention how he has a plug stuffed up his ass before going back to work without another word.
He doesn’t miss the look on your face though, how might you use this information later?

Kaneki is shy and so quickly embarrassed, but if you tell him how nice he would look, and how you bought him one special, and just how nicely you’ll reward him later he become easily persuaded to wear it through the day.
He ends up feeling a lot needier and much whinier than he thought he would, and enjoying it much more than anticipated.

Tsukiyama’s is custom made and embedded with jewels. He wouldn’t wear it through the day, he would start teasing you from the start, flaunting around like an exotic bird and telling you exactly what he’s done until you ‘punish’ him for it.

Is it too perverted to ask if any of the ghouls would have a menstruation fetish, especially with human?

I think I died on my keyboard seeing this.
But honestly, I just wrote about them sucking breast milk, I doubt ‘too perverted’ is in the cards here.

Uta no doubt. He takes every chance to get a little taste of you, licking a cut, sticking his tongue in your mouth [and other places], and it’s not as if he’s shy about going down on you.
And your sweet blood mixed in? Uta’s new favorite treat. If you’re unsure about it, Uta will remind you that orgasms relieve cramps, and he will be very happy to help any time you’re in pain. Plus the image of him smirking up at you from between your legs, licking the blood off his mouth is rather convincing.

Nishio would go down on you, all the while acting like this wasn’t brought on for his own enjoyment and telling you how ‘You’re stupid to let a ghoul be so close. It’s like you want to be eaten’
Then licking away any blood that’s gotten on your thighs and definitely planning to do this again a little later.

Sullen, quiet, Yomo. He wouldn’t bring up going down on you during your period, but if you asked for assistance then Yomo would get hot under the collar slowly savor your blood in his mouth. You’ve hit one of his kinks on the head, not that he’d voice that.

Itori: a pro at eating you out, also a pro at talking you into letting her eat you out during your cycle. While every ghoul loves the taste of blood, Itori always compliments yours. She also likes when she can’t see the difference between your blood and the lipstick marks she’s left on you.

Tsukiyama would, but think twice before letting him get between your thighs. He’s been known to go a bit overboard and might get a little crazed from your scent and the taste of your blood and begin to literally eat you.
He would feel remorse but also be poetic in French, whether you live to hear his smooth monologue or were a full course meal in bloodlust.

Eto wouldn’t be opposed to the idea at all, quite contraire. Especially if you’re shy about bringing it up to her. She drags you too a room where you’ll definitely be heard by others and enjoys teasing you with her fingers until you cum a mess before she licks it all up.

Only after writing all these and editing did I realize that you said ‘menstruation fetish’ and not oral during menstruation. So I hope this still suffices.

Request!: which of the ghouls would be into sucking breast milk from lactating s/o?

(I’ve spent 3 days trying to figure this was an actual request)

Tsukiyama, he would be the biggest one into it, likely sucking the breast milk so often that s/o doesn’t stop lactating. He treats it like a drug just as much as his bloody handkerchief.

Kaneki, boy has a mommy kink. Pet his hair and let him live out his fantasies.

Ayato maybe? he’d act cocky like its an assertion of power but really he just likes it, he feels safe while sucking on s/o’s breast and hates that. Would probably get grumpy and bite on s/o’s nipple if they said anything about how cute he looks.

Touka would be far too shy and flustered but definitely not opposed to s/o sucking from hers.

Uta. With his curiosity he’s all too happy to take a taste. He doesn’t really care for the flavor but doesn’t stop. And squeezes the breast to watch more milk drip out before licking it up.

Itori would think it’s hot. Probably get drunk and tell Uta and Yomo all about your bedroom adventures and jokingly offer them a taste. But otherwise not super into it.

Bonus: Because I’m on some kind of roll here

Juuzou, with his warped views he really doesn’t see why it would be considered odd. He enjoys it right? and you do too? he likes s/o’s flavor, and their breasts are extra soft while filled.
Will hug s/o in public, smiling so innocently, and say “Can I have some milk now (Y/n)-chan?”