Creepy Man

There was this customer in my family's business. I was talking to another customer. I know he was listening to our conversation. She was teaching me words in Spanish. He was taking his time to getting out. Whenever he comes in he creeps me out. He waited for the customer to leave. He ask me if I wanted to learn how to speak Punjab. I said I try but couldn't pick it up. He said maybe you didn't have a good teacher. I told him its a hard language. Then he ask me how to say pus$y in Chinese. I totally freak out. Omfg Why would you ask someone that. Was he crazy? I stop talking and waited at the door till he left. Creepy number 2 I have another customer he always ask me when do I work. I told him my hrs change. I didn't think he was weird at first. One Sunday morning I heard him saying hehehe she here. Talking to himself. He been doing that since the summer. He always sneaks up scared the shit of me. I try not to talk to him but he always comes up and try to have a conversation. Whenever he there I walk away from him. I try to stay away until he gone. What's wrong with these men? Do they need to take there medication?