not all species of animal have the male bigger, smaller female setup. Sexual dimorphism is what biologists call it when one is bigger and stronger than the other. Perhaps the extreme case is the Black Widow spider. The male is lucky not to get *eaten* after successfully impregnating the female. He's like a bug compared to her size. no one has any idea how this was a successful evolutionary adaptation.
Humans are sexually dimorphic, the males on average bigger and stronger then the females. Human MATING STRATEGY however, varies. There *is* a male aggressive, male non-lethal combat ritual to human mating. Example: I seen her first! The men fist fight. The female is impressed (swoons) over the bigger stronger male that wins. Elaphae Obsoleta, the humble rat snake (black snake, commn term) has non lethal male combat ritual as a mating feature. The males rise up, and engage in wrestling. they seek to press the other to the ground, in some sort of a "pin". Its not clear to humans who "won", but they know... the loser slithers off and the winner mates.
humans also have an alternate mating strategy. the male prepares a nest, and is more caring to show how good he'll be at feeding and caring for the mate and the hatchlings. This is more reminiscent of many bird species. The male will be the one to have highly colored feathers, and perform mating dances and songs. Many of these birds, the males make the nest, and feed the female to show how good of a mate they will make.
human beings actually have a split strategy. They can do one, the other, or both.
The male lion, with his kingly mane? He roars, and sort of announces the hunt. Yet you will see mainly the females going out, and actually bringing down the large prey doing the hunting. Female lions are not entirely unable to defend themselves against the advances or violence of the males. When a female lion says "no!", she's not kidding.
A word about dominant or submissive behavior. Laymen hear the words dominant and submissive, and assume that its both behavior in daily life, as well as behavior in a relationship and in the bedroom. Its * not*. dominant (alpha) behavior at work or socially, is NOT the same as dominant in the relationship, nor in the bedroom.
A very dominant alpha male, aggressive at work and socially both. Socially successful at both, mind you. Could be "submissive" in his relationship with his pair bonded mate. That simply means when he comes home from work, he has no issue with the wife making or suggesting most decisions. Its actually far more common, then people think. Also, submissive in the BEDROOM, is separate from submissive in the relationship, and submissive socially.
Laymen see "sexy videos" of (supposedly) "dominant women". Rest assured, you're seeing nothing of the kind. All you are seeing, is a performance.
SOME human societal structures have at times, had the female of the species, doing very "male" things. I forget the tribe name, but... the males? Paint their bodies and make and wear jewelry and feathers. They cook and clean up, and engage socially. The women do most of the gathering of food and other "male" activities. No one knows how or why this happened, but to that tribe, that was normal. Yes, the females engage in combat ritual, to claim a male mate. When that tribe and its area was at one time more widespread, the females from one village, would fight the females form the other village.
Human Sexuality as a discipline in psychology? Is not a "gooner" course of study. You can find yourself cracking open 800 page textbooks of technical reference material. And the bullshit all across the internet, the talk shows, etc... is "bumper sticker" level of depth and understanding, and that's at best.
My Dennis Miller rant, is now over. As you were.