Is it normal to be turned on by women’s breasts but only attracted to men romantically and sexually?

I’m a 29-year-old woman, and I’ve always been romantically attracted to men. I’ve dated men, I’m currently with a great boyfriend, and I’ve tried dating women in the past and it just never clicked for me emotionally or romantically.

I genuinely prefer sex with men, I love having sex with my boyfriend and I love the feeling of being penetrated and dominated by him in bed. That part of my sexuality is really solid for me. The only confusing part is how I can react to women’s breasts too, even though I don’t feel any romantic or broader sexual attraction toward women.I don’t want to pursue women, and I’m not interested in relationships or anything beyond the chest aspect. And because it feels so specific and one sided, I sometimes worry that it makes me a bad person or that I’m objectifying women.

Other than having sex with my boyfriend, women’s breasts can turn me on. Not women as a whole, not the idea of being with a woman romantically, and not most kinds of girl-on-girl content. It’s specifically breasts. Watching them bounce, seeing them touched. When I would watch porn I’d watch women masturbating, women with natural big tits, women using dildos, humping pillows, but just to see their boobs bounce. I won’t focus on the vagina or butt or face but just their boobs. And areolas, specifically ones that are a bit more pigmented and puffy. Sometimes I fantasize about kissing sucking them or having them in my face while I pleasure myself.

I’m posting because I want to understand whether this is just a kink/fetish, a normal variation of sexual attraction, or something other people have experienced.