The winner of last month's poll. Though a bit late, I hope you'll agree it was worth it for this three-part image. The events depicted are from a new alternate Earth setting, where the vast majority of the human population is female (around 90% in most areas of the world) with most of the remainder being fully functional hermaphrodites. Sex determination between the two is hormonal rather than genetic, with both having XX chromosomes and females having female children and hermaphrodites bearing hermaphrodites. Male humans do exist in this world, but are a biological oddity, resulting from a dropped X chromosome for an XO "pairing", like in some stick insects. As “chromosomal disorders” go, this is a fairly common occurrence, with males naturally occurring in about 1 out of every 500 births. Like those stick insects, female humans are capable of reproducing on their own via parthenogenesis. This is actually referenced in the image, with "parth" being slang for the act of initiating parthenogenesis via hormonal control, and "gennies" (singular gennie, pronounced like the name Jenny) being a common term for the clonal daughters born from parthenogenesis.

As an alternate Earth, the inhabitants of this world simply call it Earth, but I've given it the semi-serious codename of "Tribble", because of the reproductive rate of it's people. On this world, the gestation period is much shorter, around a week for a female pregnancy and a month for a hermaphrodite. Additionally, female pregnancies result in a litter of precocial infants, with litter size ranging from three to twenty, and averaging eight. On top of that, female humans are biologically required to get pregnant at least once per month, otherwise they start to experience pain and an assortment of health problems, culminating in eventual death within a year if she does not get pregnant.

On top of this, both females and herms have a very strong sex drive, so casual, even public, sex is extremely common, and in many cultures multiple marriage and/or open relationships are the norm, with some others not even formalizing relationships in such a manner. So, offering sex as a "tip" for a delivery worker would not be seen as overly forward or even that unusual in most places on "Tribble".

Herms, on the other hand, can only become pregnant seasonally, and require another herm to impregnate them. Though they produce sperm year-round, they only ovulate once a year, when they undergo estrus. Additionally, they can go their entire life without bearing any children and not experience any health issues because of that. With herms, single births are the general rule.

There is a good reason for hermaphrodites having a much lower birth rate. Though all sexes have some increased flexibility of their orifices to accommodate the typically massive penises of hermaphrodites, human males and females on this world aren't any more capable of swallowing another creature their own size than a real life human. However, all hermaphrodites undergo a series of changes in their mid to late teens, during which they develop the ability to swallow large objects - sometimes with multiple orifices - experience a sudden increase in metabolism and begin to crave live, especially human, prey. In many regions, as long as certain conditions are met - common examples being that the prey is either willing or a stranger, or that the act of consumption does not take place in public - it is legal and at least somewhat accepted for herms to eat people, purely as a safeguard against overpopulation.

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