AITAH for not wanting to call my boyfriend "Daddy"?

So, I (18F) started dating this guy (20M) after moving to Florida for college, and things have been amazing—great connection, great chemistry, and honestly, he makes me feel really wanted. But recently, he asked me to start calling him Daddy in bed, and I just… can’t.I study psychology, so I know that kinks and roleplay can be tied to all sorts of things, and I really tried to be open-minded. But the second I even thought about saying it, my brain just shut down. It doesn’t turn me on—it actually makes me cringe a little. I told him this, and he laughed it off at first, but later he said he felt like I wasn’t willing to explore things for him.It’s not like I’m against trying new things, but this one just doesn’t feel right to me. Now I feel guilty—like maybe I should be more open-minded? He says it’s just a fun dynamic and not that deep, but I can’t shake the feeling that if I force myself to do it, I’ll just feel weird about it.AITAH for drawing the line here? Or should I try to get over it since it’s something that turns him on?