As soon as it is uncomfortable to parents. In some families children are put to sleep alone in a crib from the very first moment and in some others they stay in parent's bed for many years. It really depends on parents, whether they are happy with such sleeping arrangement or not.
I am personally OK with my children sleeping next to me but I know there are some who are not. Judge it in your own heart.
This answer to this depends on your parenting style. Some believe you need to set rules and schedules starting in infancy and others, like my husband and I, believe that raising a child means making decisions based on the child and other factors. They way we parent is sometimes called "attachment parenting."
We allowed our children to be close, feel loved and safe, and form strong attachments to us. Now that they are teens is has paid off 100 times over.
If you do plan to make them stay in their own bed, then the answer below holds true. The longer you let them stay, the harder it will be. We also waited until they were asleep and put them in their own beds.
If they came back later, it was still OK. We reasoned and encouraged them to sleep in their beds, but understood when they were afraid, lonely, or sick. What always stuck in my head was that they saw that Mommy had Daddy to keep her company, but expected the little ones to be brave and go it alone.
I admit, their were many nights of interrupted sleep, but trust me, they eventually want to sleep in their own rooms. It's really a short period of time compared to the rest of their lives, and it makes them feel safe in the world.
For my children it wasn't exactly a specific age because it happened over time. My daughter, who has OCD, came back to sleep on the floor in my room when she was 9 because of her terror at night. At the time I had no idea she had OCD, and now I am glad we worked through that time in a loving way.My son was simpler, and he stopped coming in to see us by 5 or 6.
Probably by the time he was 4 it was infrequent, but it still happened.
Before your child is 1 year old, he/she shoul stop sharing the same room. Because he/she must get her/his self confidence.
It depends is it the only bed in the house , if not you should stop sharing beds as soon as they turn a age were they start finding things and crawling because it will be very hard to get them out ofthe room with you after a certain age and you will have no privacy, otherwise break the chain slowly by waiting till they fall asleep and then put them in thier own bed , they will get use to waking up in thier own room and then it will be o.k.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.