"SmellMyDick" is a porn video tag often used in the adult industry. It implies that the content features a scene where a performer or performers are encouraging others to smell their penis (or dildo/strap-on) during a sexual act, such as oral sex or masturbation. This specific request can be seen as an act of dominance, humiliation, or simply exploring new sexual fantasies and desires. Note that "smellmydick" is not standard English but rather slang used in adult content descriptions.