My DS is aged 3.8, and I have never slept in the same bed as him.
Occasionally when he is ill, we will go to the spare bed (he calls it the sick bed) and I will lay with him until he calms down, then he goes back in his own bed. I have attempted to sleep with him but he such a fidge pants and I end up putting him back.
Luckily when he wakes up in the night, he calls out and never gets up.
I mentioned this to a friend and she thinks that is weird that we have never slept in the same bed. Do you?.