As science culture gravitates toward a more holistic inclusion of both males and females in research design, the outlining of sex differences and their respective intersections with disease physiology and pathophysiology should see reciprocal expansion. Melanoma skin cancer, for example, has observed a female advantage in incidence, mortality, and overall survival since the early 1970s. The exact biological mechanism of this trend, however, is unclear and further complicated by a layering of clinical variables such as skin phototype, age, and body mass index. In this perspective, we highlight epidemiological evidence of sex differences in melanoma and summarize the landscape of their potential origin. Among several biological hallmarks, we make a note of sex-specific immune profiles-along with divergent hormonal regulation, social practices, DNA damage and oxidative stress responses, body composition, genetic variants, and X-chromosome expression-as probable drivers of disparity in melanoma initiation and progression. This review further focuses the conversation of sex as an influencing factor in melanoma development and its potential implication for disease management and treatment strategies.Melanoma is the deadliest form of skin cancer, accounting for over 80% of skin cancer-related deaths but contributing to only 1% of cases (American Cancer Society, 2021). Exposure to ultraviolet radiation (UVR) remains a major risk factor and is implicated in about 86% of melanoma cases (Parkin et al., 2011). While UVR is mostly associated with initiation, biological sex is another less understood risk factor in melanomagenesis where males are at greater risk than females. The extent to which biological sex impacts melanoma disease initiation, progression, and patient survival/mortality is not clear and warrants further empirical research. Current limiting factors include a historical dearth of study frameworks evaluating both sexes, a lack of reliable models for investigating melanoma, and a prevalence of confounding clinical variables between biological sexes. A recent push by the National Institute of Health (in January 2016) to factor sex as a biological variable (SABV) into experimental designs is an appropriate first step toward alleviating these unknowns and will be discussed in greater detail toward the end of this review.Over the past four decades, epidemiological studies and cancer registries have reported distinct sex differences in melanoma incidence, progression, and survival. According to the Surveillance, Epidemiology, and End Results (SEER) program database from the National Cancer Institute, both males and females of Caucasian ethnicity showed a striking positive trend in melanoma incidence since 1975(Siegel et al., 2021. Male individuals experienced more intense rates of recorded incidence and mortality compared with females over the same 40-year timeframe (Figure 1A). Upon stratification for age, the trends in mortality did not change; however, females tended to have more frequent diagnosis of melanoma th...