Finding a way to get all those little genes together. Surely someone in government could contrive a less troublesome method of reproduction, designing the thing from scratch. For all the uncertainty of sex, there are vast benefits in its tumult. Through the rich differences between male and female, the reshuffling and recombining of genes, life finds its way forward. Amphibians walk out of the water.
Monkeys develop opposable thumbs.
Man learns to walk upright. Shuffle the cards again, and sex finds pathways around diseases and mutating viruses that would otherwise extinguish us. The chaotic jumble of sex is nature's creative secret. It allows change, adaptability, and advancement. The cost, however, is astounding.