It turns out that yawning is also a sign of sexual attraction rather than a sign that a person is tired, British scientists say.
According to British scientists, yawning reveals a wide number of human emotions, including interest, stress and even desire for sex.
Unfortunately, British scientists still can’t determine which kind of yawn shows sexual attraction and which a need for sleep.
Their theory is that yawning will remain a great mystery, although everyone do it at least 240,000 times in their lives.
Although it is still not clear why people do yawn, scientists are convinced that one purpose of yawning is to supply the brain with extra oxygen.
