Sleeping in separate rooms (or a "sleep divorce") does not harm couple happiness and can be a beneficial solution for preserving one's sleep and individual well-being.

noli's read

Looking into "sleep divorce" is fascinating because science shows that sharing a bed is a highly nuanced subject for our well-being. A survey by the American Academy of Sleep Medicine (AASM, 2023, observational survey) reveals that one-third of couples choose to sleep separately to preserve their rest. Regarding relationships, researchers at the University of Berkeley (Gordon & Chen, 2014, observational study) established that sleep disturbed by a partner fosters tension and decreases empathy the following day. However, a study from the University of Kiel (Drews et al., 2020, observational study with physical measurements) shows that sleeping together can synchronize sleep cycles and increase restorative dream phases when partners are physiologically well-matched. Thus, choosing to sleep in separate beds does not harm couple happiness if it helps resolve sleep conflicts, making this practice a perfectly valid option for daily harmony.

the sources

No named source held this one up — that absence is part of the verdict.