Well I can't help but agree Shirley! 
I have never understood why 2 grown adults are expected to share a 4 foot X 6 foot space, to (try to) sleep for 8-9 hours - it is quite horrendous really.
I mean there are worse things to suffer in life - as you probably know LOL - but sharing a bed with someone is actually quite horrible most of the time. What with being kicked and elbowed, and having the quilt hoiked off you, getting hot and sweaty, his farting, his grunting, and OMG the SNORING.
So many marriages have been affected/ruined by intense snoring.
Sleeping in the same bed as your spouse harks back to days of old, when (usually poor) people did it to keep warm, and because of a lack of room. For some reason, people continued to do it, and in the eyes of some people, it's thought that there must be something wrong with your marriage if you have separate bedrooms.
Weird really, because many of the happiest, most successful marriages are where the couple have separate bedrooms. Most of the middle and upper classes have separate bedrooms, and many expensive and upmarket homes are sold with 2 double bedrooms, to enable both adults in a couple to sleep separately.
Me and DH have had separate bedrooms for about 10 years now, and would never go back - never. It's cute and cosy to sleep together in the same bed when you're 18-20, and are in the early throes of your relationship, but long-term, not so much. Sleep deprivation is a form of torture, so why put yourself through it voluntarily?!
So many people have said 'get a super king bed,' but that only gives you 18 inches of extra width, with isn't all that much really, and it doesn't eliminate issues like farting, grunting, and snoring. If you have got one, separate bedrooms are definitely the best! 
If people can get past this ridiculous idea that 'it's not right' for a married couple to sleep separately, and not give a fuck what anyone else thinks, there would a LOT more happy marriages! And despite all the shoutouts for a super king bed, separate bedrooms are waaaaay better if you want a good night's sleep... 
Every time me and DH go on holiday, we book separate rooms. Doesn't cost THAT much more, and it's utter bliss. You can see the envious eyes of the other couples as they wonder why they didn't think to book separate rooms. And the women stagger downstairs to the dining room for breakfast, with a haggard look, as their snoring husbands have kept them awake half the night!!!
@sexnotgender
Shared a double bed with my husband with no issues at all. We moved and bought a king size and actually I hate how far away he is.
A king size bed is SIX inches bigger than a double! He's not that much further away. 