To clarify, I'm mostly referring to when the child isn't actually in the room.

When do you think you should start asking your child before going in their room? As a parent do you believe you always have the right to? What are your views on children privacy regarding their room?

Bonus question: Would you allow your child to have a lock on their door?

This question also applies to a child who lives with you, even after 18, or even lives on their own but the parents come over often.