When I first started living in the same house, my wife (then girlfriend) would always move closer to me in bed so we'd maintain contact in bed. I didn't want to roll onto her in the middle of the night or anything like that so I moved again for separation. She moved closer and I moved further. Then I asked her why she's doing that.

Turns out that she had read something that says that the most successful couples have some sort of physical contact in bed. I let her know that the contact in bed is a result of the successful relationship, not the other way around.

It's been five years since then and we sleep in separate blankets with no physical contact in bed. So far, it's been a successful marriage! :)