It is a world most sought after by people with more intense desires for new experiences that they would not find in most others. The biggest common trait among people who took this train is that they always want to know new things, being open and honest with their feelings towards themselves and others.
In this world in question, everyone has at least one extra body part, be it an arm, a leg, a head, genitals or anything that normally exists in the human body. The features that someone can have include parts that would normally be found in people of the opposite sex. So men having breasts or vaginas were not uncommon, as were women having at least one dick or balls (not necessarily having both). Due to the possibility of having sexual parts of both sexes, those who had them had their genders defined by which was fertile, as no one had female and male fertility at the same time.
People's extra parts were always human, no one had an animal part attached to their body. The only thing they had that was different from something normally human was their tail. There are people who have at least one tail, which is generally very malleable and has only human skin covering it, no fur or anything that resembles any specific animal.
For those with extra arms, these can be distributed vertically, with the torso being longer to accommodate them, or horizontally, with more shoulders and the extra arms in front or behind the main ones.
People with extra legs are divided into three categories:
1)Wide: Person with wider hips and legs arranged side by side. Usually accompanied with extra genitals and extra butts, with those that didn't having them being rare.
2)Split: When the body divides below the chest into two or more entire lower parts.
3) Taur:The body extends backwards where the extra legs meet.
4)Star:The legs face in all directions around the person, usually describing a number of points that indicate the number of legs, so a five-pointed star person is one who has a total of five legs around them. It is also normal to have your own genitals in each space between your legs, and most only have an anus centered beneath them.
Note: It happens and it is not that uncommon for a person to have more than one type at the same time, combining Wide, Split and Taur. Only the Star type does not mix with any other type.
People with more than one head have their own mind and personality in each head, but they are recognized and treated as a single individual, even sharing a single name.
Extra heads, breasts and genitals can form anywhere on the body, and genitals can defy size standards and can be tiny or huge.
The customs in this world are also very different. Traditional clothing stores, for example, do not exist in this world. As there are very different differences between people's bodies, the clothes are all customized, which makes tailoring one of the most profitable professions.
Relationships are, in general, polygamous, and body structures favor the birth of babies with DNA from 3 or more people at the same time, so someone can have two or more fathers, although they still always have only one mother.
Sex in this world is also treated as something casual, as long as the person does not let it interfere with their own life or that of others, and it is not seen as wrong if done in public. As for the presence of minors, this makes no difference, as they do not develop any interest in the subject before entering late adolescence, simply ignoring anything related to the topic, even if it happens right in front of them. Therefore, people can have sex in the presence of minors as long as they do not try to involve them in the practice.