Baltimore. Some people may have experienced an incident of yawning when they wanted to make love. Of course this can provoke a negative reaction from partner, because yawning is generally regarded as a sign of boredom. In fact, yawning could be a sign that the body is aroused.

“Yawning is the nature of evolution that were shared by all vertebrate species. Fish do it, lions do it, people also do it. It is embedded in the primitive brain and even the fetus in the womb also evaporate,” said Dr. Robert Provine, professor of psychology neuroscientist at the University of Maryland, Baltimore.

Human evaporate for various reasons such as feeling tired, or can also be a social instinct because yawning is also contagious.

But yawning is in fact a sign of the emergence of passion. Yawning can be caused by the release of dopamine in the brain hormones that trigger the release of brain chemicals such as oxytocin and nitric oxide.

Dr. Provine describes a study with scientists who experimented with Melanotan or PT-141, a drug that can increase libido and blood pressure to provoke arousal. Researchers found that in addition to causing an erection, nausea and yawning is also generated as a side effect of the drug.

“Yawning serves several functions of the body. But yawning is generally associated with changes in body condition, from sleep to wake, from waking to sleep. So when the bodychanges from not aroused to aroused, it happens to evaporate. Yawning when they wanted to have sex is not a rare thing , ”said Dr. Provine as reported by msnbc.com on Thursday (1/26/2012).

Provine speculates that sexual climax and yawning may have the same evolutionary roots. Will evaporate when having sex does not mean boring or lack of oxygen or sleepy, but rather a sign that the body is aroused.