WuFlu About 50% More To Kill Da Menz

Easy--dudes just declare themselves women for the duration.
What?
Is there some reason why this won't work?
I like that the only hypothesis they consider is "lifestyle differences."
I've got a different one. Wanna hear it?
Anyway, back to the real world: why is this troubling? What does it matter if dudes are more susceptible? Another way to think of it is: women are less susceptible. Does that help?