You would agree with me that the beards may be sexy, but it is not something you need in reproduction.
According to @mobbs, some people in China eat pubic hair to become pregnant. So, who knows...
Regarding the last few paragraphs, from what I remember I think most available science says that beards overall are protective against bacteria and such.
Some Chinese must practice the most weird pseudoscience known to man. But do the experiment work for them? :)
I guess we must eat pubic hair to find out :P