I realize there are certain hardships that only females must endure, such as childbirth, waiting lines for public-restroom stalls and a crippling, psychotic obsession with shoe color. Also, females tend to reach emotional maturity very quickly, so that by age 7 they are no longer capable of seeing the humor in loud, inadvertent public blasts of flatulence, whereas males can derive vast enjoyment from this well into their 80s. So I grant that it is not easy being a female. I don't know WHY males get stuck with this burden, but it's true throughout the animal kingdom. It's always the male bird who does the courting dance, making a total moron of himself, while the female bird just stands there, looking aloof, thinking about what she's going to tell her girlfriends.
Male insects have it the worst.
On any given day during mating season, I'll see dozens of male lizards out there making their most suave lizard move, which consists of inflating and deflating a red pouch under their chins. They seem to think that female lizards really go for a guy with a big chin pouch, but I have never once, in 14 years of close observation, seen a female respond. They just squat there looking bored, while all around them males are blinking on and off like defective warning lights. Every now and then you'll see an offbeat TV news story about some animal, usually a moose, that has for some reason fallen in love with, and decided to relentlessly court, something totally inappropriate, such as a lawn tractor. In the news report, they show it hanging around the lawn tractor with a big sad moony look, totally smitten, while the lawn tractor cruelly ignores it.