[SketchySeaBeast]

As I understand it there has been a noticeable dip (~25%) in the last few decades. I don't know if that's a crisis, but it's been theorized to be caused by any number of things, including a less active lifestyle, stress, and endocrine disruptors in the environment. Given the range of possible causes, "Just throw more Testosterone at it" seems like a poor initial solution.

[nradov]

Higher body fat also causes low testosterone, which contributes to gaining more fat in a vicious cycle.