[Jack Hydrazine]

Why should men be motivated to go to work if women are doing them?

Any time a traditionally male-dominated activity has women join it men eventually flee.

Now why is that?

[Wyatt's Torch]

The participation rate for women is also declining after it peaked in the 1990's:

[Vigilanteman]

Any time a traditionally male-dominated activity has women join it men eventually flee.

Now why is that?

Among my Native American ancestors, it was common knowledge that all the women in the village had their monthly periods at about the same time.

And, by some strange coincidence, all the men and boys in the village would take off for at least a week long hunting, fishing and camping trip at that time, leaving behind only the boys too small or the men too old to keep up.