And you get various mild sex perversions, such as masturbation, and so on.
What does all this mean?
It means that the activity of the lower psyche and lower body is polarized by the upper body.

Eyes and ears want to gather sexual activity and knowledge.

The mind becomes full of sex: and always, in an introvert, of his _own_ sex.

If we examine the apparent extroverts, like the flaunting Italian, we shall see the same thing.

It is his own sex which obsesses him.
And to-day what have we but this?
Almost inevitably we find in a child now an intense, precocious, secret sexual preoccupation.