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by toasterlovin 876 days ago
IMO it’s a lot more complex than paternity. Concerns about sexual propriety are actually fairly symmetric and not at all one-sided. Men are also penalized by potential mates if they have a reputation for sleeping around. My hunch is that both sexes invest a lot of whatever resources they have (money, time, effort, etc.) into a relationship and they want that relationship to be stable and long lasting. And sexual propriety is a strong indicator of whether someone will be a stable long term mate.