AbstractA 5 item sexual permissiveness scale devised by Reiss, and 4 personality inventory scales purporting to measure psychoticism (P), neuroticism (N), extraversion (E) and propensity to dissimulate (L for lie scale) were administered to 427 male and 436 female subjects aged between 20 and 50 years. It was found that men were more permissive than women on all 5 items; that items are intercorrelated in a pattern which could be predicted from the Guttman‐type properties of the original scale; that high P scorers were more permissive than low P scorers; that high L scorers were less permissive than low L scorers; and that extraverts were slightly more permissive than introverts. All the findings relating to personality and permissiveness were in good agreement with findings from previous studies of the relation between personality and sexual attitudes. Assortative mating was studied for 241 couples who formed part of the original sample. Correlations for permissiveness were all positive, and reached significance for all but one of the scales. For the personality scales, assortative mating was found to be important only for neuroticism, a finding in agreement with previous studies.