Why are men more mentally ill than women when it comes to sexuality?

There seems to be more gay men than lesbian women. There seems to be more trans women than trans men. For example, trans women are 1 in every 30,000 people, whereas trans men are estimated at 1 in every 100,000 people. There is even many, many men that love pre-op trans women. So, what makes men this way?
Why are men more mentally ill than women when it comes to sexuality?
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