https://www.vice.com/en_us/article/59dx ... rans-women
In order to understand the act, you first need to understand the anatomy involved: Bellwether describes the act as "being [finger-]fucked in one or both of my inguinal canals," which are, as she puts it, the "twin 'pockets' that are situated in the groin above and behind the testicles and scrotum." Generally speaking, inguinal canals are the canals that the testicles descend from—the same pathways that balls get sucked back into when you jump into a pool of cold water. Bellwether refers to these parts of her body as her "cunts," and uses that chill term interchangeably with their medical name.