This usage of the terms is in an affiliative sense.
I first noticed this phenomenon with regards to how it has historically been wielded against transsexuals see Whipping Girlpp.
In other words, it is synonymous with the more contemporary term cis.
When the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to cruise adult only usual procedure code.
Gender-specific services may be medically necessary for transgender persons appropriate to their anatomy.
Sometimes we decide to change them even though we know we won't be accepted as women, and wouldn't want to be accepted anyway.
Others use it in a more specific manner -- for instance, it is sometimes associated with a particular strand of radical queer politics, or a certain type of androgynous or trans masculine gender presentation as I allude to in Outspokenpp.
From Margin to Center.