Why are older women called COUGARS and looked down while It's thought to be totally normal to date much younger women as an older man?

Why there's a need to use that word if in the case of older men, they don't get called similar names?
Why are older women called COUGARS and looked down while It's thought to be totally normal to date much younger women as an older man?

Why are older women called COUGARS and looked down while It's thought to be totally normal to date much younger women as an older man?
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