This porn video tag, "pregnant-tranny," has two distinct meanings in the context of adult content.
1. Pregnant: In this context, it refers to a woman (or transgender individual) who is carrying a developing fetus in her womb, giving her a visibly more rounded abdomen than usual. This can be considered as a unique aspect of female sexuality and attracts some individuals.
2. Tranny: This term is short for "transsexual," which means an individual who has undergone or is undergoing hormonal treatments and/or surgeries to change their physical appearance from their assigned gender at birth to the gender they identify with. In this case, it refers specifically to a transgender woman (often called a "shemale" in adult content).
So, the tag "pregnant-tranny" describes a porn video featuring a transgender woman who is pregnant and may be showcasing her pregnancy along with her unique physical attributes. This type of content may appeal to individuals who find such combinations of factors particularly attractive