Is it unique with humans

that breasts are erotic?
For a girl, it's something she experiences.
Does a boy really think of a girl's breasts as sensual and sexual unless someone tells him?

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FeetAreFantastic · 41-45, M

I think boobs being erotic is uniquely human yes. Because actually humans are the only mammals who have permanently visible breasts. All other species only grow bigger breasts during the pregnancy and nurturing period. So there's probably some evolutionary advantage of displaying them so proudly.