There was no need to try this to increase pleasure from satisfying hunger for more food. Our modern technology, like for much better farming, has by now been providing so much easily produced and enjoyed good tasting food that this had become a problem, with many folks too easily becoming overweight.
But some natural hungers were good to at times selectively improve. This included hunger for often wanting to enjoy joining in social animal pleasures, helpful for good cooperation with others to nicely more quickly gain better fuller progress accomplishing a variety of useful joint tasks. This has helped make humans very good at advancing technology and other things.
A number of people were agreeing that it should be nice and good for happier matings to be able to gain increased pleasures from not infrequently engaging in good sex with one's beloved mate. They could be kept safe from having too many babies, thanks to several fertilization blocking methods. Wanted sexual pleasure rewards had of course been quite helpful for keeping humans a good reproducing species, surviving well among other also gradually evolving species.
So gene varieties got studied which helped produce matured extra enjoyed strong pleasures in some adults from their future sexy playing. By now, a selectively better genetic DNA embryo could be obtained by selecting wanted DNA parts for a single-cell embryonic human zygote (which will then develop through several stages as an embryo over an 8-week period).
As such selectively best still fully natural genetic humans matured, and then found nice partners from the other sex, they liked having been selectively given our found best natural genes including for the strongest sexual pleasures.
Also some natural gene versions were found which contributed very good sexy pleasure responses from nice fond sensual caressing maybe over one's chest. In other animals, some limits on sexy pleasures had been useful to keep sex used mostly to produce their needed new genetic inheriting descendants. But for us, by now overpopulating Earth, there seemed no good reason to confine sexy pleasure enjoyment to only the primary reproductive sexual organs.
This is a guest post. Questions? Ask Iwas.A.Member@gmail.com. If interested in much more about advanced future folks living quite well in space, ask for DOS compressed email attached FBW.Z