Why do men get defensive whenever a woman says she suffered sexual assault?

I know not all men are rapists and misogynists but why do we have to be reminded of that from guys who have not committed sexual assault of that fact every time some famous guy like Donald Trump or Johny Depp is accused of having committed sexual assault and when discussions of sexism and misogyny is discussed.

Why do men get defensive whenever a woman says she suffered sexual assault?
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