Why The Security Was Called

Riddle: A woman is in a hotel room. She hears a knock and she answers it. There stands a man. 'Sorry,' he says, 'I thought this was my room' 'It's no problem,' the woman says and she shuts the dork as the man walks away. As soon as the door is shut, she calls security. Why?

Answer: If it's your room, you don't knock. Source: https://riddles.com/4637

A woman is in a hotel room. She hears a knock and she answers it. There stands a man. 'Sorry,' he says, 'I thought this was my room' 'It's no problem,' the woman says and she shuts the dork as the man walks away. As soon as the door is shut, she calls security. Why? — Why the security was called by Candy Monster C Riddle