3 years olds 4 year olds 5 year olds they like to sleep and cuddle with their parents its universal around all cultures in the world throughout all time periods so its really normal  children are not damaged by the experience of sleeping with their parents as long as the kids are pretty young when your child is maybe 5 or 6 you might show him is own room and encourage him to go there you certainly don’t want 7 year olds 8 years olds and 9 year olds sleeping with you because as they develop their needs change so when they’re little go with it if it doesn’t bother you if it works well for your family there’s no reason to stop it,  its not harmful at all.
Sarah Chana