Is it okay to share nothing with your partner other than the bed?

I think what I asked is different what if they have two bathrooms and separate closet/wardrobe and dressing area etc? Nothing else is different than a loving a couple.

@SW-User I get what you mean, my mum and dad have that living arrangement at their house, but they are also in an open marriage too. So they have that extended freedom as long as there's no strings attatched. I think they are at that stage of life where they want to feel free before they hit the retiring age.

Oh God! Is it that hard for anyone to understand my point.. I was not intending open relationship. I mean the couple is happy and satisfied it's just that they don't have same wardrobe where her bra is missing and found with his shirt and his shaving kit is lost with her perfumes. Where he can shower and she can also shower in her bathroom having said that when they feel taking shower together they obviously can. The bed, the kitchen and all other rooms and stuff is all shared like a couple or a family.