"Solo Trans Male" refers to a type of adult content featuring a transgender male performer who engages in a self-pleasuring act or masturbation without involving another person. In this case, the solo aspect signifies that the scene is focused on one individual, and 'trans' means that the performer has transitioned from female to male. "Male" indicates the gender identity of the performer, which is typically masculine in appearance, even though they were assigned female at birth. This type of content appeals to audiences who are specifically interested in transgender male performers and their unique bodies, as well as those who appreciate solo or self-pleasuring scenes