Transitioning is the process of changing one's gender presentation and/or sex characteristics to accord with one's internal sense of gender identity – the idea of what it means to be a man or a woman, or to be non-binary or genderqueer. For genderqueer people, the internal sense of gender identity is neither solely female nor male. For transgender and transsexual people, this process commonly involves reassignment therapy (which may include hormone replacement therapy and sex reassignment surgery), with their gender identity being opposite that of their birth-assigned sex and gender. Transitioning might involve medical treatment, but it does not always involve it. Cross-dressers, drag queens, and drag kings tend not to transition, since their variant gender presentations are (usually) only adopted temporarily. Transition must begin with a personal decision to transition, prompted by the feeling that one's gender identity does not match the sex that one was assigned at birth. One of the most significant parts of transitioning for many transgender people is coming out for the first time...