Well, yes, it is normal to be sexually attracted to a woman who is ready for both, procreational sex and pregnancy, to notice the markers, and to treat girls who don't have those signs as "daughters" and "nieces" and "sisters." It also used to be natural, apparently, to treat signs of aging in women as markers of readiness for cultivational sex rather than procreational sex, though I doubt that these markers were entirely physical -- after all as a species we didn't differ then from what we are now, and we always had a brain. (At least until very recently...)
All taoist arts of the bedchamber (the real deal, not Mantak Chia's sexual constipation practices) are based on the premise that sex is way more than procreation and pleasure, it's a direct unbroken connection to the source of life itself, and like any high level practice, takes time and experience to fully master. I believe they come from that faraway prehistory --
of which we know so little and have been told so many lies so often by people who pose as experts without any merit, just based on their penchant for extrapolating how THEY would fare under those circumstances. That's why they portray our ancestors as clumsy and accident-prone and generally at the mercy of everything -- the elements, the beasts, "struggle for survival," what not. Then they dig up a skeleton of quite possibly a centenarian and assert that our ancestors lived short lives because to them this skeleton looks like that of a modern 20-year-old -- no arthritis, no osteoporosis... they determine lifespans by the amount of accumulated bone degradation, they have no other measuring tool for this. And it doesn't occur to them that a human born and raised into health and never stunted from reaching peak abilities of the body and mind (there was nothing to take away from these and everything to let them fully unfold) was a creature not only very sturdy but in fact formidably strong and powerful. And long lifespans were necessary because grandparents were prominently active in child-rearing... and frail, stupid old men and women is a modern civilized phenomenon -- people used to grow wise and competent with age, not senile...
...but I digress too far.
Edited by Taomeow, 29 October 2016 - 02:01 PM.