Sexual dimorphism is typically found in species where the man has to compete for females; the more sexually dimorphic a species, the more the species is Males Compete, Females Choose (MCFC). We know humans are sexually dimorphic due to things like body mass and body::testicles ratio, which is greater than geese and prairie voles, but less than that of gorillas.

The more sexually dimorphic a species is, the more likely it is to be a tournament species. The pair bonding effect is greater in species with low sexual dimorphism than those with high sexual dimorphism. Pair bonding refers to the release of chemicals found in what we would call "love" as humans. Chemicals cause feelings of "she is the one, etc." Naturally attraction can not be negotiated because it's largely a hind brain process.

What we have found, in tournament species, however, is that it doesn't matter how you're doing as much as it matters how you're doing RELATIVE TO OTHER MEN. If an alpha gorilla gets fucked up by another gorilla, he's still fundamentally the same gorilla. But suddenly he's sexless.

In the prairie vole it doesn't matter the oxytocin drip is enough for the female to not leave.

To relate this back to humans, this means that if everyone suddenly became 6 foot 6, was all sociable and had high status, women would start looking for the men that were the MOST sociable and the HIGHEST status. If we were not tournament species, the pairing off would be at 1:1. Bam. No involuntary sexless.

If one believes in my OP they believe in hypergamy. If they disagree they don't believe in hypergamy.