FTM-cock refers to a female-to-male (FTM) transgender individual's penis. In the context of pornography, this term may be used in descriptions or tags to indicate scenes featuring a person with a trans male background engaging in sexual activities, particularly those involving their penis. This tag is intended for an adult audience familiar with transgender identities and the various terms associated with them.
In more explicit terms, ftm-cock can also refer to specific sexual acts or fetishes related to this particular body part. It is essential to remember that people with different gender identities have diverse experiences, desires, and boundaries, and respecting these differences is crucial when consuming or creating pornographic content.