” said the spider to the fly.“There are pretty curtains drawn around, the sheets are fine and thin, And if you like to rest awhile, I’ll snugly tuck you in.” - Mary Howitt Alternate continuation to My Claimed Heart.Saiyan Karma Sutra Chapters 1-20: Vegeta gives Goku a bonding present not meant for others to see. SKS Revisited Chapters 21-:66 Vegeta takes the throne as King of Vegetasei.The King and his mate deal with the jungle soldiers who retained their memories of a old Vegetasei.SKS Reckoning: The Saiyan God appears and the royal family deals with the repercussions of using the book. Mpreg, smut, incest, sub dom, continuous fiction, fluff, new Vegetasei, if Vegeta was king As of 8/3/17 new chapters in clean up to be posted soon.Though the timing and connections that made it happen are pretty clear, it's still hard to fathom how a band as sonically prickly as Black Dice got so popular.
But it is not, as far as I know all higher developed species are using the standard way of reproduction (male and female). Many other fish are sequential hermaphrodites, but that is probably outside the scope of your brief - its quality not quantity.
sort of like asking 'why do we bother getting married and buying houses when we could just hook up at a bar every weekend?
' hermaphrodites can reproduce more easily, but other organisms invest more in their offspring and also often have a harder time getting around to mating. It is perhaps easiest to address the question by countering it and asking why dioecy (2 sex systems/2 gonochoric types e.g. As you have pointed out there are obvious advantages to being a hermaphroditic species such as more chance of mating - more likely to provide an advantage at very low population densities where interactions are infrequent.
Therefore at higher population densities, when mating opportunities are not rare, the gonochoric individuals will have a higher fitness because they have more energy.
Monogamy is also analogous to rare encounters but true monogamy is rare (1 partner for life).