A further limitation of the present study is the subjective nature of the SPSs protocol. Could the results be flawed? That the perception and the subjective report of SPSs may be based on distorted body representations [50] is not disturbing at all — this is what we call the conscious image of the body. By definition, SPSs are purely subjective phenomena that cannot be produced by the experimenter, which is what makes studying them extremely difficult and why they should be interpreted with caution. Above all, SPSs cannot be studied using the gold standard methodology of interoception, in other words by comparing objective and subjective parameters. However, a link between SPSs reports and heartbeat perception accuracy reduces the degree of skepticism possible about SPSs investigation. What this study shows is that SPSs are closely linked to interoceptive processes, which are private by nature.