Testosteron levels have indeed gone down.
References And these trends are still ongoing:
Lokeshwar, S. D., Patel, P., Fantus, R. J., Halpern, J., Chang, C., Kargi, A. Y., & Ramasamy, R. (2020). Decline in serum testosterone levels among adolescent and young adult men in the USA. European urology focus. Sperm counts have plummeted: Levine, H., Jørgensen, N., Martino-Andrade, A., Mendiola, J., Weksler-Derri, D., Mindlis, I., … & Swan, S. H. (2017). Temporal trends in sperm count: a systematic review and meta-regression analysis. Human reproduction update, 23(6), 646-659. Weakening grip strength: Fain, E., & Weatherford, C. (2016). Comparative study of millennials'(age 20-34 years) grip and lateral pinch with the norms. Journal of Hand Therapy, 29(4), 483-488. Self reported masculinity obliterated: https://today.yougov.com/topics/lifes… This is also hurting middle age to elderly men who have to deal with age related decline on top of this: