>>14259107In nature humans were promiscuous and polygamous. We selected considerably more socially than other species and we really didn't have to worry all that much about safety when having sex. Only big predators where am issue an in groups you always have a lookout.
So basically it was like this. Girls would get fucked constantly by a lot of people as soon as they reached sexual maturity, the penis is designed to scoop out semen from the vagina while it moves, the longer faster and deeper you move the more you remove the present semen from the mix and when you're done you inject your own into the girl. The more you fucked the same girl and the e better you did it the more chances imshed carry around a higher percentage of your semen inside her. Also girls grew breasts so you'd fuck them looking them in the eye and develop deeper bond. But the key thing is that selections occurs by sex, which is mostly a social act but also selects for endurance strength of a lot of main muscles in the body and a bit of motor coordination, which if you think about it is a decent summing up of humans main qualities.
Until some small dicked idiot decided to use "intelligence" and started using the sticks we used to kill mammoths for safe infinite meat to kill big dicked males, so everyone covered their dicks not to get killed but still somehow had to convince ladies they might have a big sick without fellow males finding out, also form alliances to not get sticked in which frankly the actual sex is secondary and thus began the era of intelligence and society and ended the paradise of constant sex whenever anyone felt like it.
