Sexology Courses Certified PG Diploma in Sexology, Pune under Indian Society Of Sex Medicine. More Information WhatsApp 9822006427, 9604715783. Sex: Sex refers to biological and physiological characteristics that define males and females. Sex is also used to mean sexual activity. GENDER: Gender refers to socially constructed roles, behavior, activities, and attributes that a given society considers appropriate for men and women as masculine and feminine. GENDER IDENTITY: Gender Identity is an individual's private and personal perception of being male or female. GENDER ROLE: Gender role is an individual's outward expression of maleness or femaleness in social settings.