PSY sexual motivation

% of

self identified = 2.8 and 1.4 vs attraction to same = 6 and 4 vs. opposite sex = 9 and 4

theories of etiology

MZ twins are more likely to have the same result of being gay or lesbian

Birth order effects

gay men have greater than expected proportion of homosexuality if they are born later in the birth order

Proximity

physical nearness, a predictor of attraction

Similarity

extent to which we have things in common with others a predictor of attraction

Reciprocity

rule of give and take, a predictor of attraction

Waist to hip ratio

men and women prefer certain body shapes men tend to attracted to women with a waist to hip ratio of about 0.7

evolutionary vs sociocultural explanations

sociocultural people prefer others who are thinner, evolutionary, tend to reflect an absence of genetic mutations, serious diseases, and other abnormalities