When I was young, we all slept together. Four of us (three girls and one boy) slept side by side, and it was fun. I remember nights of giggles and whispers and Mom saying "1". We knew it would go to "3" before we would get it. Often when she said "2", we would say "2 1/4" and giggle some more.
Now that I'm older, okay, much older than those fun times, I like the fact that I can reach over and feel someone next to me.
There is a comfort in sleeping with your husband in the same bed. I know some don't. I think Paul Newman and Joanne Woodward didn't and they are famous for that. Some sleep apart because the snoring of one disturbs the other. Some choose to sleep alone because the bed isn't big enough to accommodate two huge bodies.
I used to like sleeping alone on a queen size bed. Not anymore though. I like the comfort of knowing someone I love is by my side.
(pic from here)