Why do men get so much disdain for dating an underage girl, but the underage girls rarely get the same response?

Legal consequences aside, I’ve noticed that men are usually hated for dating someone much younger than themself, whereas an underage girl is most often allowed to date someone older without the same societal hatred. This is Especially true when the relationship is consensual.
Why do men get so much disdain for dating an underage girl, but the underage girls rarely get the same response?
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It’s weird to read responses. When I wrote this question I was thinking more like a 4 year age gap like 16 and 20. Yet you people automatically assumed a huge age gap like 30 years difference. What’s wrong with you people?
Why do men get so much disdain for dating an underage girl, but the underage girls rarely get the same response?
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