Chapter 13 notes: development and expression of sexuality. Sexual identity: the complex of personal qualities, self-perceptions, attitutudes, values, and preferences that guide one"s sexual behaviour; your sense of yourself as a sexual person. 4 key features: sexual orientation: individual preference of gender with whom to have an emotional/sexual relationship- include hetero, homo, and bisexuals (also includes lgbt-lesbian, gay bisexual, transgendered community; grouped together b/c they often have intersecring interests). Nature of these constraints/messages varies depending on gender, race, ethnicity, and socioeconomic status: erotic preferences: within the limits of 1 and 3 people differ in what they enjoy. Physiological influences: their influence on sexual anatomy is much greater than their influence on sexual activity. Hormones and sexual differentiation sexual differentiation: hormones that play a role in gender distinction in prenatal development during the 3rd month of prenatal development, hormone secretion begins in the gonads (the sex glands). Psychosocial influences: same as the main sources of gender-role socialization.