The present study is aimed at understanding how trans masculine and nonbinary individuals describe aspects of their sexual dissatisfaction. Previous studies on cisgender sexual dissatisfaction have utilized narrow definitions of dissatisfaction, operationalizing it in opposition to sexual satisfaction. Moreover, the pervasive focus on the outcomes of medical intervention steps in prior sexual dissatisfaction research with trans masculine participants ignored the experiences of individuals who do not desire a medical transition or live outside of the gender binary. Participants in the current study represented a non-clinical sample of 358 trans masculine and nonbinary individuals who responded to the question: "In what ways are you dissatisfied with your sex life?" Thematic analysis revealed six overarching themes for participant dissatisfaction: 1) difficulty with orgasm, 2) partner dynamics, 3) trauma, 4) desire for different body parts, 5) gender dysphoria, and 6) medical transition. Discussion focuses on the ways in which clinicians can utilize the current findings to decrease the sexual dissatisfaction of trans masculine and nonbinary individuals.