Main sexual orientation and genre in Hentai

Here are the most common classifications found in hentai, based on the gender dynamics and sexual orientation of the characters:

Straight (Hetero)
Straight hentai features relationships between characters of different sexes. This is the broadest and most widespread category, depicting intimate interactions between men and women. It can include a multitude of scenarios, power dynamics, and fantasies, ranging from gentle romances to more intense and sometimes controversial scenes. The variations are endless, exploring different age groups, social contexts, and situations.

Yaoi (Boys' Love / BL)
Yaooi is a genre that focuses on same-sex male relationships. It is generally created for a female audience and features romances and sexual interactions between men. Yaoi stories can vary greatly in tone, ranging from sentimental and passionate romances to more explicit and graphic depictions. This genre is also known as "Boys' Love" (BL) outside the specific context of pornographic hentai.

Yuri (Girls' Love / GL)
Unlike yaoi, yuri explores same-sex relationships between women. This genre is also popular with a diverse audience and depicts romantic and sexual bonds between women. As with other categories, yuri presents a wide variety of narratives, ranging from the exploration of intimacy and tenderness to explicit and intense scenes. It is often referred to as "Girls' Love" (GL).

Other Specific Categories
In addition to these three main categories, hentai includes subgenres and themes that can overlap or exist independently:

Futanari
Futanari is a specific genre where female characters are depicted with male genitalia (penises) in addition to their female organs. These characters can interact with men, women, or other futanari characters, creating unique sexual dynamics that blur traditional gender lines.

Trap
The term "Trap" in the context of hentai (and anime/manga in general) refers to characters whose appearance makes them appear to be a gender different from their biological sex, often a man who appears to be a woman. Interactions in this genre can explore themes of confusion or revelation regarding the characters' gender. It's important to note that this term can be controversial outside of its specific usage in these communities.

Shemale
Similar to futanari to some extent, the term "Shemale" in hentai often refers to female characters with masculine characteristics, or more specifically, transgender women or intersex individuals. However, the use of this term can also be perceived as problematic or offensive in certain contexts, as it has historically been associated with the fetishization or dehumanization of transgender women.

Netorare (NTR)
While not a genre based on sexual orientation, Netorare (often abbreviated as NTR) is a very common theme that can be found in any of the categories mentioned above. It involves a character having their partner "stolen" by another person, often involving scenes of infidelity or betrayal. It is a genre that plays on emotions of jealousy and loss, and is often controversial due to its sometimes graphic nature.

The diversity of genres in hentai is a testament to creators' desire to explore a wide range of fantasies and relationship dynamics. Whether it's heterosexuality, homosexuality, or more fluid gender concepts, these categories allow fans to find content that matches their specific interests.