The Sexual Desire Inventory (SDI), developed by Spector, Carey, and Steinberg in 1996, has been widely used to assess sexual desire in men and women throughout the world. This questionnaire categorizes sexual desire in two dimensions: dyadic sexual desire and solitary sexual desire. Our study addressed the factorial structure of the SDI, an aspect that until now has been largely neglected. We recruited two samples of Spanish men and women involved in stable heterosexual relationships. The first sample consisted of 3,417 subjects (1,600 males and 1,817 females), ages 18 to 84; the second sample consisted of 677 subjects (285 males and 392 females), ages 18 to 50. The results of an exploratory factor analysis (EFA) showed that instead of two dimensions the SDI should have three: (1) partner-focused dyadic sexual desire, (2) general dyadic sexual desire for an attractive person, and (3) solitary sexual desire. A confirmatory factor analysis (CFA) supported the robustness of this new three-factor structure. No gender differences were revealed, except for dyadic sexual desire for an attractive person, for which men reported higher scores. Good validity and reliability values were obtained. Moreover, standard scores for men and women by different age groups were developed.

Romantic jealousy is a complex emotion activated by a real or perceived threat to the relationship. Romantic jealousy is an important phenomenon in public health, as it brings consequences for the subject, the couple and the rival, even to the point of death. This theory-based study performed a systematic review of the research published in major international databases and platforms, as of December, 2016. The results of 230 studies that met the inclusion criteria were classified in pursuance of the variables associated with jealousy: a) personal variables (differences in sex, sexual orientation, hormones / use of contraceptives, self-esteem, attachment style and use of alcohol); b) interpersonal variables (romantic love, satisfaction and violence); c) sociocultural variables (transcultural comparisons, features of the rival and social networks). Future studies, with sufficient statistical robustness, should achieve a clinical formulation that indicates the relevance and predictive power of each variable.

The aim of the present study was to explore the relationship between (1) sexual satisfaction and (2) socio-demographic variables, health status, and relational factors in Spanish men and women. Using a quota sampling method, we assessed 2024 subjects aged between 18 and 80 years old with a socio-demographic questionnaire, the Global Measure of Sexual Satisfaction, the Global Measure of Relationship Satisfaction, the Short Form-36 Health Survey, and the Symptom Assessment-45 Questionnaire. Regarding the results, no significant differences in sexual satisfaction were found according to gender or sexual orientation. At the bivariate level, sexual satisfaction was negatively correlated with age, low education level, psychopathological symptoms, and length of relationship, and positively correlated with better physical health and relationship satisfaction. In heterosexual individuals, 55% of the variance in sexual satisfaction was predicted by vitality, depression, relationship satisfaction, length of relationship, and type of relationship. In homosexual individuals, bodily pain and relationship satisfaction predicted 44% of the variance in sexual satisfaction. Finally, the impact of health and relational variables on the sexual well-being of adults in the context of sex therapy is discussed.