Sex and sexual behaviour are a core part of life; besides reproduction, sex offers opportunities for pleasure and can be beneficial for bonding, intimacy and for many facets of one's life. However, along with these desirable features, sex and sexual behaviour can also have the clear down side of providing ample opportunities for contracting infectious diseases. To elaborate on this high risk of contagion, let us consider one of the simplest sexual activities, French kissing. This activity entails the sharing of saliva, with the capacity of more than 80 million bacteria in a single 10-s kiss transferred to the other person (Kort et al. 2014). Other sexual activities, such as intercourse, and/or coming into physical contact with the ejaculate and vaginal fluids, may similarly pose a high risk of contamination (Curtis 2013;Kort et al. 2014). Thus, the inherent contagious nature of sexual behaviours and sexual (by)products may help explain why sexual stimuli, may also be generally considered as potent disgust elicitors (Rozin et al. 1995).Disgust is thought to serve the evolutionary function of self-protection (Rozin et al. 2008) and disease avoidance (Oaten et al. 2009; see also Bradshaw and Gassen, Chap. 3, this volume). By the expressed disgust-driven inhibitory tendencies, operating via defensive reflexes, or by actively motivating avoidance (or withdrawal) of disgust-evoking stimuli, disgust is thought to protect us from contamination by nonvisible pathogens (Curtis et al. 2011;Oaten et al. 2009). In line with the protective function of disgust, it has been shown that disgust propensity varies as a function of vulnerability to disease. For instance, Fessler et al. (2005) found a temporary