Objective: Vaping, initially a smoking cessation aid, is now a widespread recreational activity sometimes associated with perceived health concerns. This study explored attitudes, harm perceptions and cessation barriers in the context of participants' vaping behaviours, guided by the theoretical lens of fundamental social causes. Design and Setting: The study focused on a subset of 571 current adult vapers from a larger survey investigating vaping attitudes. It analysed open-text survey responses relating to vaping behaviours. To analyse the responses, we employed layered analyses, using deductive conceptual mapping to inform an inductive thematic content analysis. Results: Participants mentioned nuanced vaping risks, citing cancer and respiratory concerns, often comparing them to tobacco's well-known harmful effects. Despite acknowledging vaping's potential harms, participants perceived the practice to be less harmful than smoking, emphasising relative safety. Some viewed vaping positively for former smokers, contingent on regulated products. This complex attitude balance reflected the intricate interplay between health concerns and social dynamics. Recurrent vaping symbolised consistent engagement, with cravings and widespread availability associated with quitting challenges. Conclusions: Participants' nuanced perceptions of health risks reflect a harm duopoly, resembling illicit drug harm tiering. There is a complex interplay between health knowledge and social influences in the context of vaping behaviours. Study findings underscore the need for messaging interventions discouraging vaping among those who do not smoke tobacco to consider these health and social dynamics, leveraging collaborative design.