Biological category based on physiological & anatomical difference. Ascribed status born with; result of cell formation. We dichotomize sex when it runs along a continuum: m f. 1-3% babies born intersexed not directly clear from external genitals if male or female: over 90% surgically reassigned as females. Being male or female, in society s mind, is biologically determined: males/females should act a certain way. Gender is a social category but culturally defined: what is appropriate masculine or feminine behavior. Sex codes: premarital sex standards: abstinence standard forbid. 28% forbid for women: love standard depends love and respect: present now. 4% mildly disapprove: fun standard permit for pleasure, as long as both are consenting. Risman: c change massive change in last generation. Do we disrespect those who have too much casual sex: egalitarian conservatives lose equal respect for men and women, egalitarian libertarians.