there could be several possible reasons for this behavior:
Lack of Awareness: It's possible that your father may not be fully aware of the importance of privacy or the need to knock before entering your bedroom.
Cultural Norms: In some cultures or households, knocking before entering someone's room may not be a common practice.
Habit: If your father has been entering your room without knocking for a long time, it could simply be a habit that he hasn't thought to change.
Lack of Boundaries: Sometimes, parents may not recognize or respect the need for personal boundaries, especially if they've never discussed the issue with their children.
Communication Gap: Perhaps there hasn't been clear communication between you and your father about the need for privacy and the importance of knocking before entering your room.
If you feel uncomfortable with your father entering your room without knocking, it's essential to have an open and respectful conversation with him. Try explaining your feelings and the importance of privacy to foster better understanding. Communicating your needs and concerns can lead to positive changes in your relationship and create a more respectful living environment for both of you.