No, it's not always ugly to swear. On the contrary, swearing can help you perform better, at least in strength and endurance tests. Swearing can act as a boost when we need it most. Or as
The research team behind the study expresses it: Swearing is a cheap, readily available, and drug-free way to help yourself. The performance-enhancing effect comes from us becoming more uninhibited when we swear and
This makes us push forward instead of holding back. When the study participants swore, they also reported feeling more flow. The group behind the study will now investigate whether swearing also affects our pain threshold and whether really strong swear words work better than more everyday and ”gentle” swear words.
Source: American Psychologist