Fertility clinics measure semen quality in terms of millions of spermatozoa's per milliliter. Good numbers are around 40-90 million, which means that 1 liter of jiz from a healthy, fertile man contains something on the order of 75 billion sperms. The typical human issue of semen is approximately 2 to 7 milliliters per ejaculation.
For the purpose of this theory we want a conservative male number, so let's say our conservative spudge factory makes it up to a production level of 15 million spermatozoa's per milliliter (15M spz/ml) by age 15, and produces consistently at this level until he's 40 (aka, for 25 years.) Let's further specify that he busts his nuts about 4 times a week, each shot yielding on average 3 ml of fluid.
(25 years * 200 ejaculations per year) * (3 ml * 15,000,000 spermatozoa's) = 225,000,000,000 lifetime sperm production. That's like 28 times the population of the entire earth! And it's much, much lower than real life, a typical male 40 years ago produced 10 times that at least... but for the purposes of this theory, it will be:
Male lifetime gamete production: 225,000,000,000.
Now for our hypothetical female subject, we want a very liberal estimate, so let's say super mom starts bleeding at 10 years of age, and ovulates until she is 60 -- 50 years. For round numbers let's say she produces 100 eggs per year, which would be 8 point something eggs each menstrual period. (In other words, 8 times as much as normal.)
100 eggs per year * 50 years = 5,000. In reality she could only possibly carry a small fraction of those eggs to term... but for the purposes of this theory, it will be:
Female lifetime gamete production: 5,000.
So, wimpy little namby-pamby conservative male, whose low sperm count would be seen as a real problem for a couple trying to have babies, out-produces super-fertile egg-slinging wonder-female, 45 million times over:
Gamete production mismatch factor: 45,000,000
Now, historically and in nature, what happens when a producer of something is effortlessly producing millions of times more of that something than it could ever use? Distribution, of course. Prices drop, and the main duty of that producer becomes getting rid of that something, any and every way it possibly can!
Oops, did we shoot 100 million of them on her belly? Uh oh, did we wipe-up 100 million with a dirty sock? So what, who cares, we'll make another 200 million by tomorrow. It only takes one: we send-up 100 million. For sure, best case, 99,999,999 are sent to die; worst case, they all die, but we make so fucking many of them every damn day, that it just doesn't matter.
The other side of the equation guards her eggs carefully, she has only a very limited number, she can't afford to waste any of them. Compound that with the physical burden of carrying a fetus to term, and the word 'selective' doesn't even begin to describe her mindset! When picking a sperm producer, she feels she has no room for error, she instinctively knows she's got to make each one count. (Ironically most women will tend to make stupid decisions for wrong reasons, but I digress...)
So what conclusions can we draw from these formulae?
We can estimate that females will be 45 million times more selective than males.
The female typically seeks a single male.
The male has no actual limit in mind, logistics and practicality are his only limiting factors.
The male will exercise almost no judgment at all when choosing a receptacle for his seed.
The female will be so selective, she may even change her mind while in the process of receiving an issue, and will play other bullshit games as well, in her confusion and fear that's brought on by her inherently intense selectivity. The level of judgment she will exercise is so extreme that it will all but consume her.
