This physical and spiritual act is no more than a couple´s tool for exploration, because one can feel, touch and try the object of desire.
In criminal investigations the evidence based on DNA could be decisive in the sentencing of a guilty person, who however much conceals their fingerprints can leave as criminal evidence, a hair or any other proof when escaping the crime scene.
It is known that our genetic mark is found not only in hair or body fluids, a suspect can be found responsible of a criminal act through odours, which dogs can trace and identify.
As implausible as it might be, the print of a kiss could be treated as new evidence that can help to clarify rape cases and, even more controversially, identify the adulterous.
A passionate kiss
During the investigation conducted by specialists from the Institute of Molecular Biology of the Slovakian Comenius University in Bratislava, dozens of voluntary couples were asked to kiss passionately in intervals of five, 10, 30 and 60 minutes.
Then, the experts collected saliva samples from the female participants. The method used is designed to identify the chromosome Y, carried only by men.
“We have demonstrated that it is possible to obtain a complete (genetic) profile, that could be useful in the investigation of sexual crimes (in cases in which the victim may have been forced to kiss the attacker), to identify suspects and exclude innocents”, wrote Natália Kamodyová, main author of the investigation, in New Scientist magazine.
The next step by the specialists is to determine whether this DNA could be preserved for a longer space of time, and also if it could extracted from a deceased woman as a result of a rape crime.
In the mouth
The Karma Sutra, ancient manual about human sexuality, also describes various types of kisses in the mouth, one nominal in which the lips hardly touch each other, another throbbing, in which only the lower lip moves, not the upper and sexual touching involving lips and tongue.
This last one modernly called a ´French Kiss´.
Beyond histories and manuals, a kiss can reveal how ideal a couple could be. What starts as an attraction at first sight, could disappear after the first kiss.
According to the results of a study presented three years ago in a meeting at the American Association for the Development of Sciences, a man´s saliva contains chemicals revealing his fertility and evolutionary conditions.
For the anthropologist, Helen Fisher, of Rutgers University in New Jersey, author of that investigation, the kiss is no more than a couple´s tool for exploration, because one can feel, touch and try the object of desire.
Besides stimulating brain chemicals such as dopamine, a neurotransmitter associated with motivation and pleasure.
Another inquiry presented in that meeting revealed that amongst people that feel attracted to one another, it reduces the levels of cortisol, an hormone related to stress, and increases the oxytocin, linked to sexual intimacy.
The kiss is not exclusive to humans, chimpanzees and bonobos, close relatives of humans also touch lips.
Other animals also touch each other with their mouths, for example, foxes lick their muzzles and elephants introduce their trunks in the mouth of other members of their group.
About the kiss, there must be a lot more to discover, but the study carried out by the experts of Comenius University, even when it doesn’t reveal any peculiarities about this old practice, demonstrates a possible usefulness for the police.
(Translated by Evelyn Dench – Email: Edench75@gmail.com)