Hopefully that’s not a widespread cis het male opinion.
Guys do sexualize female breasts, but it’s supposed to be in context of intimacy. It should be no different than sexualizing her neck - an exposed body part is not an invitation to sexualize it (edit: on its own). In an intimate encounter, sexualizing a body part is an extension of the overall appreciation of and desire for the human being it’s connected to.
So, Doomy, if you see a pair of tits, you should interpret that as she doesn’t want her tits crushed inside a bra. And don’t stare while you’re thinking about it.