Sexual script theory and masculinity theory suggest that men should demonstrate high levels of desire in order to abide by social norms and expectations. The current study explored the degree to which men’s descriptions of their sexual desire supported or deviated from these theories’ propositions. Thirty men between the ages of 30 and 65 ( M age  = 42.83) in heterosexual long-term relationships ( M duration  = 13 years, 4 months, range = 2 years, 11 months – 39 years, 4 months) were interviewed about their experience of sexual desire. Grounded theory methodology from an interpretivist perspective was used to analyze the data. The majority of participants described having high and constant levels of sexual desire and just over half reported never turning down an opportunity to engage in a sexual encounter. However, most men also indicated that their sexual desire was sometimes feigned in order to appear more masculine or to prevent upsetting their female partner. It is suggested that researchers, therapists, and sex educators be mindful that men face pressures to exhibit sexual desire in stereotypically masculine ways and that outward demonstrations of sexual interest may not always be accurate representations of men’s true experiences.