This essay will be about gender/identity. This subject is very broad and has a lot to choose from depending on your interest. For example, you may choose to detail your feeling about your looks over the years, the global differences of beauty ideals, being a man/woman in America vs. another country, the gender issue in a career/sport, gender identity vs. sexual identity, sexual taboos, gender taboos, and so on.
Perceptions and all types of media influence on how we view gender and/or identity. Process any fallacies you see about your chosen topic through a critical thinking lens. Keep in mind that you will want your thesis to reflect that.
Examine different perspectives to analyze the subject.