How can I help my younger brother?

He is 19 years old, he is straight as he had girlfriends before, but now he has no interest in them.

He says " women have sky-high standards that even if he passes for the initial attraction, he should work tremendously to keep the relationahip alive and the women satisfied."

That is what he said to me when we talked. I mean he is not that wrong. But can I help him somehow?

How can I help my younger brother?
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