At present my wife and I share the same bed, as we have done since we first started living together nearly 39 years ago. But increasingly I am becoming uncomfortable sharing so closely with someone whose personality I hardly recognise, who often doesn't change out of the clothes that she has worn day and night, whose basic hygiene has plummeted, who is increasingly careless about keeping herself and her clothes clean after using the toilet, and who seems totally oblivious to all of this. Our current routine starts with 8am reveille and we are together throughout the day and all evening until bed time around midnight. Then we go to bed together. At the end of such a long day of being together but apart I would appreciate some space to myself but I don't get any. I am thinking that it is time for us to have separate bedrooms but am worried that my wife will see this as an affront or as having some sinister purpose (her fantasy of me as a serial adulterer has subsided recently but is just waiting to be reawakened). Does anyone have tips on how to approach the subject of sleeping in separate beds in a subtle, sensitive, but effective way?