ladyboy: Young and often very feminine transexual. The term "ladyboy" often reference an asian (from thailand) young feminine boy or transexual. See also "kathoey".
thai: This niche involves individuals from Thailand either posing or engaged in sexual activity.
asian: Porn involving oriental women or men.
webcam: Type of videos captures via webcams, often on sex video-chat sites or sex cam streaming sites. Those almost allways implies an "amateur" dimention.