The objectives of this study are to compare the two definitions of female sexual dysfunction, namely dysfunction per se ( A category) and personal distress caused by dysfunction ( B category), and to gauge their associations with some sociodemographic aspects and level of sexual well-being. The subjects were a nationally representative sample of sexually active Swedish women (n: 1056) aged 18 - 65 y, who participated in a combined structured interview/questionnaire investigation. The functions analysed were: self-reported sexual desire, interest, lubrication, orgasm, genital pain and vaginism, which were subclassified for the A and B categories into no, mild ( sporadically occurring) and manifest dysfunction. Sexual well-being was reported along a six-grade scale ranging from very satisfied to very dissatisfied. The sociodemographic items registered were: education, occupation, financial situation, social group, immigrant status, location of domicile and church-going. Aggregated mild and manifest dysfunction per se of sexual interest, orgasm and vaginal lubrication were reported by about 60 - 90%. More than one-third had dyspareunia, but few reported vaginism. Mild dysfunctions were clearly more common than manifest dysfunctions. Not fully 45% of those with manifest low interest and orgasm perceived these dysfunctions as manifestly distressing, while in 60 - 70% lubricational insufficiency of dyspareunia led to manifest distress. Age and the included sociodemographic variables had marginal or no influence on sexual functions. A four-factor sexual function pattern was identified, closely linking A and B categories in a pairwise manner. Three factors, labelled sexual desire, orgasm and genital function were powerful classifiers ( discriminant analysis) of level of sexual well-being. Hence, it is a matter of taste whether to use the A or the B category. Together, they can explain the gross level of satisfaction with sexual life to an adequate extent.