Fuckin' bedwetta' I want ya sweater
Did Falling Testosterone Affect Falling Crime? | Slate Star Codex
This secular decline in testosterone is pretty dramatic. Our best source is A Population-Level Decline In Serum Testosterone Levels In American Men, which finds that from 1987 to 2004, average testosterone declined from 501 ng/dl to 391 ng/dl, with an even more dramatic decline in bioavailable levels of the hormone. That’s about minus 1% per year.