Touching makes better sleep

Ichigo • I have one daughter. I'm also pregnant with my second. Unmarried.
Who sleeps better when cuddling or simply touching their SO. I myself don't have an SO, but I still sleep (lay in the same bed, no sex) with my daughter's father when we stay over. If we sleep on completely opposite sides of the bed, I can stay up staring at a wall for hours, but as soon as I, idk, put y head on his elbow, I fall asleep. Besides the fact he's my ex, and it's weird we sleep together anyways, does anyone else experience this with their actual SO?