It's a good start, but I feel like they're missing something glaringly obvious.
Simply, when you have a biological process that is critical to the survival of the species, then it's highly likely that evolution is gonna go in the direction that the process winds up being a pleasurable experience. Just like how we now have a problem with obesity - fattening foods were incredibly scarce in the wilds, so we evolved to seek that stuff out like a homing missile on a SAM site. Same applies to sex - survival of the species = having lots of babies. What to do? Make the most critical part of reproduction pleasurable.
So, while orgasm may have started out as a mechanism to trigger ovulation, it likely stuck around because the individuals that had the most pleasurable sensations were more driven to copulate as much as possible. Which means more babies. Which means that trait got passed on more than any other involving reproduction.
I read somewhere that the evolution of human reproduction is particularly complex - it was almost like an arms race between the sexes. When females evolved discreet periods with "spontaneous" cycles instead of a seasonal heat/estrus, males evolved to have semen loaded with all kinds of hormones like testosterone, progesterone, and a whole lot of others that wind up promoting female fertility in all kinds of ways (increased sex drive, more regular ovulations, better health in general).
Simply, when you have a biological process that is critical to the survival of the species, then it's highly likely that evolution is gonna go in the direction that the process winds up being a pleasurable experience. Just like how we now have a problem with obesity - fattening foods were incredibly scarce in the wilds, so we evolved to seek that stuff out like a homing missile on a SAM site. Same applies to sex - survival of the species = having lots of babies. What to do? Make the most critical part of reproduction pleasurable.
So, while orgasm may have started out as a mechanism to trigger ovulation, it likely stuck around because the individuals that had the most pleasurable sensations were more driven to copulate as much as possible. Which means more babies. Which means that trait got passed on more than any other involving reproduction.
I read somewhere that the evolution of human reproduction is particularly complex - it was almost like an arms race between the sexes. When females evolved discreet periods with "spontaneous" cycles instead of a seasonal heat/estrus, males evolved to have semen loaded with all kinds of hormones like testosterone, progesterone, and a whole lot of others that wind up promoting female fertility in all kinds of ways (increased sex drive, more regular ovulations, better health in general).