What exactly do girls mean when they dump /divorce men?

What exactly do the girls mean when they dump / divorce a man saying " he's not man enough in bed"?
His penis doesn't looks strong /nice /manly and attractive enough to arouse feelings in her
He has erectile dysfunction
He is impotent
He is unable to make her orgasm
It's just a statement/reason to dump him as she doesn't like him anyway anymore and wants divorce anyway
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What exactly do girls mean when they dump /divorce men?
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