Twenty-eight right-handed participants (16 males) were investigated. They were on average 24.7 years of age (SD = 4.3, range = 19–38). As there are differences in the chemosensory perception of self and non-self [23], only those participants were selected who did not previously act as sweat donor. None of the participants suffered from any physical (self-report) or mental disease (as assessed with the Structured Clinical Interview for DSM-IV, SKID, German Version; [24]), and none reported using chronic or acute medication. All participants scored low in social anxiety (M = 11.07, SD = 3.30, according to the Social Interaction Anxiety Scale, SIAS; [25]). Participants who described themselves as medium or high socially anxious (SIAS >16) were excluded from the study. In addition, the participants scored low in depression (M = 3.50, SD = 3.33, according to the Beck Depression Inventory, BDI, German Version; [26]) and reported a medium interest in social activities (M = 2.59, SD = 0.46, according to the agreeableness scale of the Big Five personality inventory, NEO-FFI; [27]). All of them reported to be non-smokers and to be
