Sneezing is a protective reflex that removes accumulated secretions or irritating particles and substances that have entered the airways. The irritation of the mucous membrane of the nose can be caused by various irritants – viruses, bacteria, allergens, toxic substances, tobacco smoke and others. Sneezing maintains our health and is an important part of the immune system, because it helps to clean the nasal openings and thus protects us from bacteria and viruses. But if a handkerchief is not placed in front of the face when sneezing, more than 100,000 drops are released into the surrounding air, experts say. It is especially dangerous in situations where people are at close distances, as in public transport, for example. In the next five minutes, pathogenic microorganisms circulate and can infect at least 150 people in the immediate environment, including through contact with seats, doors, etc. Therefore, experts advise strict hygiene and proper behavior among others after being in public places. Scientists have found that the speed of sneezing can reach up to 160 km/h. Probably, many women wonder what causes sneezing during eyebrow plucking. It is believed to be due to activation of nerve endings connected to the nose. Rarely, it can happen that you sneeze during sleep because the nerves responsible for this action are also asleep. Sneezing can also be triggered by physical exertion, which is due to hyperventilation. It also turns out that sex often makes people sneeze. During sex, the nerves are very sensitive, which promotes sneezing, says Neil Cao, an asthma and allergy specialist. It can occur as a result of sexual thoughts, arousal, intercourse, or orgasm. Both men and women are affected by the phenomenon. The record for the longest sneeze is held by the Englishwoman Donna Griffiths, who did not stop doing it for 978 days in a row.