My Viking genes are stirring.
The Hendricks Trimester is that period of a woman's pregnancy where her breasts and rear end get that hormone boost and expand but the rest of her body does not (especially the waist). This might be why you have seen formerly skinny or not curvy women look great when first pregnant, move up a cup size or magically develop an ass. It is a short span of time, lasting no more than three months, hence the name Hendricks Trimester, but it is a glorious three months. Through the ages, men witnessed countless women carry children. Men most likely saw that Hendricks Trimester look on plenty of women. Men who did not learn that the .70 ratio was good for child bearing had their lines die out. Others learned and had healthy children and wives. Others also learned that those curves feel great to the touch as well as mark the start of new life. Through evolution, the selfish genes wishing to procreate would realize that a woman looking in the Hendricksian way would soon give birth to a child. This cue was a sign that women who appeared that way had kids, therefore your genes passed on. New life is what matters. Our genes will drive us to procreate. Some men just need a visual cue. It's not the signal that the woman has good child bearing hips. It is that she looks like women newly pregnant who have just a bit of that extra jit that looks great. Men want an heir. Men see the .70 ratio in the wild, and the brain signals to our balls that this is a Hendricks Trimester cue. Approach!
Cross posted at Judgement of Paris.