They are different subjects, or if you prefer, the same subject at different times in their life. They're asserting that societal pressure experienced during childhood has an effect on how sexuality is expressed during adulthood. I chopped it into different parts in order to dissect and analyze it; I ultimately included the entire comment (except a sentence neither of us found relevant and you yourself didn't include), and I was not hiding anything; the entire comment was always available to be inspected, the structure and content of the comment was not in dispute, only it's interpretation.

Consider that, in the example sentence you came up with, you are referring to the same subject, at different times.