Domesticity meme. Send me a ship!
Chen would be the one cooking all the time because he doesn't trust Sehun in or around a kitchen. If he's feeling generous, he might ask Sehun to help with simple stuff--like gathering ingredients and then immediately kick him out afterwards.
All the time. All.the.time. There's hardly a moment when they don't fight, but it's typically just playful banter and nothing too serious. Their personalities tend to clash a lot which causes for an interesting relationship. Chen gets annoyed by Sehun's jokes and Sehun sometimes can't handle his boyfriend's sarcasm.
what do they do when they’re away from each other?
Probably not much. They would cross each other's mind from time to time, but they wouldn't spend their time worrying about the other. More like a mutual trust and understanding of each other--or they just don't care enough.
nicknames for each other?
who is more likely to pay for dinner?
Sehun would end up forcing or coercing Chen to pay by doing aegyo or something similar, throwing out excuses about how broke he is or saying he forgot his wallet. And Chen would fall for it every time.
who steals the covers at night?
Probably Chen, just to be a little shit. Sehun wouldn't even get mad, though. He probably has a spare one hidden just in case something like that ever did happen.
what would they get each other for gifts?
Definitely crack gifts for each other. Sehun wouldn't hesitate to buy something silly like cat ears and a tail for Chen to match his face, and Chen would buy dumb things for Sehun like a cat butt magnet or a coffee mug int he shape of a toilet. Sehun would surprise Chen every now and then with a sex toy or two just for his reaction, but eventually convince Chen to use it.
Uh..probably Sehun, honestly. He might have taken Chen's flirtatious nature too seriously and leaned in to steal a kiss, or maybe vice versa.
Probably..Sehun again. Mostly because Chen seems like too much of a pussy to truly do something first, so Sehun would have to step in and be the man here.
Chen remembers things the most, especially if they're things he would hold near and dear to himself. They each might have selective memory over certain things, but combined they'd be able to recreate memories together.
who started the relationship?
...Chen would have the balls to do this one, at least. If he felt possessive enough, he'd want to keep Sehun all to himself and he'd make sure of that by wanting to make it official.
Neither one of them cuss much, if at all. Maybe Sehun would cuss in the bedroom, but Chen seems to have a pure mouth.
what would they do if the other one was hurt?
This would be one of the only time they'd be able to take each other seriously. Chen would be the type to hug and cuddle Sehun, doing the best he can to calm the boy down and listen to what's wrong. Sehun wouldn't hesitate to kiss Chen in an attempt to remove any sadness, but he'd also play the role of a mature boyfriend and try to solve whatever's wrong.