It's not as unusual as most people think. My mid-thirties nephew is a policeman and works shifts, and they have young children. They sleep in separate rooms. My parents slept in separate twin beds placed as far away from each other as possible because my father snored like a 777 jet in reverse thrust. If they'd had a spare room available they'd have slept in different rooms.
My sil and her husband sleep in separate rooms for the same snoring reason. My own daughter sometimes emigrates to the spare room to escape the noises off from her fiancé, but she's still going to marry him in June. And he's like a yard of tapwatter (Is that just us northerners?) That means he's 6' 3" and 12 stones.
We've been married 35 years and it's only in the past year that we've
(by we have, I mean 'I' have ) discovered the joy of having your own quiet space to sleep. He has always snored very loudly, and I've just
always put up with it. He's not fat, but he has a large collar size and that is a sort of genetic thing which he can't help. He inherited his neck from his Dad who was also quite slim, but had the same genetic throat configuration and snoring issue. Around 20 years ago dh went to a sleep clinic and was diagnosed with a chronic case of sleep apnoea. Again, not associated with being overweight, but just the genetic configuration of his breathing tubes.
All good. He got a cpap machine. Again all good. It was heaven for a few years, and I got used to the peace of not being kept awake all night by snoring. And then the bloody cpap machine started to annoy me, buzzing away there all night. And when he opens his mouth and he's facing me I get a force 8 gale round my face.. I prod him and tell him to close his mouth. He responds "My mouth IS closed"
Well yes, NOW it is, but it hasn't been for the past half hour!
When I get into bed, and listen to his settling down noises (it takes some time for the cpap to kick into, and match his sleeping breaths)
he snores off and on for a half hour or so. So that's half an hour for me to be hugely irritated and for the adrenaline to start coursing through my veins and keep me awake for several hours more.
12 months ago I had a significant injury to my ankle. Any movement in the bed caused me pain so he went into the spare room. We are lucky that we have a spare bedroom and I do acknowledge that.
Both of us sleep better and longer and more restfully and have agreed that this is the way to go. If we ever feel like having sex, we have no kids at home so we can do it wherever we want.
In the living room mostly, if and when it happens. But a good uninterrupted night's sleep is absolutely paramount to personal well-being. Don't put up with having years of shitty sleepless nights like I did.
My MiL was scandalised when she visited, and me and dh slept in separate rooms. I told her it was because his snoring kept me awake.
She said that fil (now deceased) also disturbed her sleep, but that she would never have slept in a different room from him because you marry someone for better or worse.
I think she's just now realising that she could have made her own sleep more peaceful if she'd just cast off tradition. They had enough bedrooms for her to have her own.
Their youngest son, who was about 10 at the time, and was sharing a bedroom with his parents, took the duvet off his single bed and went and slept in the bath, and shut the door, to escape his father's snoring. The effects of disturbed sleep should not be underestimated.