<human>: He and I have been seeing each other for a while, but we've only been exclusive for a few weeks.
He flat out refuses to take off his hat, and won't give me a straight answer when I ask him about it. I asked him if he's doing it because he knows I'm curious and it's driving me a little crazy, or if he's afraid to take if off for some reason and he responded with, "I'm not afraid of anything."
Preemptive answers to some questions:
No, he's not balding. I can see the sides and back of his head and he has a buzz cut.
No, he doesn't have a receding hairline, I can see the tip of his hair coming out where his hat meets his forehead.
Yes, I've forcibly taken it off once. He basically held my head down so I couldn't see and he acted upset after I gave it back to him.

Do any of you have similar experiences? I'm just wondering what could explain his weird behavior.

Can you condense the text into three sentences or less?
<bot>: I've never seen him without his hat and he won't give me a straight answer as to why he won't take it off. Help?