In many cases, sleeping back-to-back is simply about comfort. Some people prefer having more personal space, while others sleep better when they can regulate their body temperature or adopt a specific posture. Turning away during sleep does not automatically mean that a couple is experiencing problems.
Sleep specialist Dr. Rebecca Robbins has emphasized that people have individual sleeping preferences and that these positions can vary for many reasons. If a partner suddenly changes their usual sleeping habits, however, it may be worth paying attention to other changes in the relationship, particularly if stress or emotional tension is also present.
Interestingly, sleeping back-to-back can actually represent security and comfort. Some couples feel close enough to enjoy personal space without needing constant physical contact. Being able to relax independently while still sharing a bed may reflect a healthy balance between intimacy and individuality.