Widespread misinformation on social media is a cause of concern. Currently, it is unclear what factors prompt regular social media users with no malicious intent to forward misinformation to their online networks. Using a questionnaire informed by the Uses and Gratifications theory and the literature on rumor research, this study asked university students in Singapore why they shared misinformation on social media. Gender differences were also tested. The study found that perceived information characteristics such as its ability to spark conversations and its catchiness were top factors. Self-expression and socializing motivations were also among the top reasons. Women reported a higher prevalence of misinformation sharing. The implications for the design of social media applications and information literacy training were discussed.