Depending on literature, testosterone levels peak at 25 to 35. So after a certain age levels in all men decline.
Only 20% of men over 60 however have levels considered as ´too low´.
However, there is no clear definition / quantity when levels are considered as ´too low`.
All this is still quite mushy however it is mostly like this with hormones.
Like for female menopause however acceptance is higher, and women know the symptoms and kind of ´expect´ them, knowing some women will suffer more than others also. But if at a certain age symptoms start, we know what to deal with, know the origin as being internal and due to hormones. A bit like with PMS - we still might be irritable and emotional too at certain days but at least with hindsight we ´know the culprit´ and don´t blame our partner. But due to women´s hormonal cycle we are usually more used to identify this, also with menopause (whereas teenage girls still need to learn this). Men are less used to listen to their bodies and the influence they have on their moods, male menopause is quite a new topic so it takes its time. Also women have internalised and accepted that what is most associated with menopause, i.e. no more being able to have children, it is less associated with lower sex drive (also this is also true for a certain percentage) whereas lower testosterone for men is so much linked to sexual performance it will be a difficult subject (even in times of viagra)...
Besides we don´t even yet have an ideal treatment for female menopause yet (hormone replacement might be linked to cancer later etc. ) so it will take quite some time to get a male menopause treatment, men knowing about it and readily and won´t help us LBS now. Except to maybe stabilise returned MLClers?
I do think testosterone plays a role (and for female MLClers maybe menopause) plus several other factors. And they all need to be treated - like if a MLC can be started or enhanced by testosterone, some men might take medication and that might be enough to keep them into transitioning over this difficult age, other more avoidant or more narcisstic personalities or somebody with more FOO (heavy abuse) might not be able to accept they have to take medication, or be more vulnerable and still react the same way.