This article explores the cases for and against the inclusion of curriculum about swearing (which includes taboo words) as a part of an Adult ESL course. The function and prevalence of swearing are discussed, including the level of exposure students face. Taboo language makes up 4% to 13% of typical daily language use (Fägersten, 2012; Winters & Duck, 2001, p. 60). Exposure to these words without context is also discussed, as it could potentially put students into embarrassing and sometimes dangerous situations (Hansen, 2016; Jay & Janschewitz, 2008; Jay, 2009; Vingerhoets, Bylsma & DeVlam, 2013). It also explores the proper and improper ways of swearing, and how swearing can actually be beneficial for both professional and interpersonal relationships. Moreover, swearing is becoming more prevalent and is no longer specific to a particular group (Hansen, 2016; Vingerhoets et al., 2013); thus, it is a bigger part of daily language. The article expresses that there are positive reasons as to why teachers might want to include swearing as a part of ESL courses for educational purposes. Suggestions for future research are offered.