In studies by neurophysiologists, it has been shown that if women are injected with testosterone (a male sex hormone), they improve their ability to solve tasks for quick wit, as well as tasks that require spatial (topographical) thinking.
The level of intelligence in both sexes non-linearly depends on the level of testosterone. In women, high testosterone leads to high intelligence, but a masculine appearance. In men — to a manly appearance, but low intelligence. Thus, women tend to be either feminine or smart, and men are either masculine or smart.
Observation by N.I. Kozlov
One of the participants in my training, Vera, was surprisingly smart — with a sharp, clear, very logical mind. But her voice was masculine, gooey, her manner a little masculine, and there was a black mustache on her upper lip. It was not good, and Vera went for hormonal treatment. Hormonal treatment reduced her level of male hormones, the skin of her face became smooth, clean and without mustaches, Vera’s manners became more feminine — but suddenly everyone noticed how Vera (in comparison with the former Vera) had grown stupid. Became — like everyone else …
By the way, she had fears that had not been noticed before.