People of many professions have their own superstitions. Most likely, they did not appear from scratch.

Doctors, for example, try not to exchange their night duties. If they do, they will have a tough night, they say. They also try not to have sex the day before the night duty. There is nothing funny about it because people usually get relaxed and become less attentive after sex.

Surgeons have plenty of superstitious beliefs. For example, a surgeon will never operate their relative or a lov...