Boys are not sustainable

Let's say that height is a desirable trait. Men usually look for shorter women while women look for taller men. The result: Men are usually taller than their spouses.

Since height is determined by many genes acting in co-dominance, which means that 'tall genes' don't block the expression of 'short genes', children of the above typical household will most probably fall in between the height of their parents. I know that there are children who are taller than their parents, but how rare? Fast forward many generations, and it seems as if all children will eventually reach an equilibrium point where women are as tall as men. Ok, we all know this is not true.

But let's look at it from a person's or lineage's perspective. The prevailing social trend of taller men reproducing with shorter women means: from the men's perspective, his superior 'tall genes' are going to be contaminated with 'short genes' from his wife. His children will carry and express both his mother's 'short genes' and his father's 'tall genes'. If the child (boy) reproduces yet under the prevailing trend (he is already shorter than his dad and now he will be married to someone even shorter), eventually, the lineage will become shorter and shorter going down their males. So, from the male lineage, this lineage is loosing a desirable genetic trait that they once had.

Of course, if the lineage don't just make boys, then their girls will probably reproduce with a taller male and thus reverse the effect. Point is, boys are not sustainable to a lineage, if one values desirable heritable traits.

But the even more important point: can we then say that men don't care about their children too much, because if they do they wouldn't reproduce with shorter women. I know, some men are so tall that if they don't do just that they might as well have gone for castration. But it's funny, just because men has got to be the 'big guy' (not really their fault alone, women are at fault too), their lineage suffers from genetic contamination.

And no, this is not about that we should round all genetically inferior people to be gassed at concentration camps. This is about how women are really just exploiting men. And we thought that they are the fairer sex...