Anti-aging. Sleep. Dating Sites ID the Smell of Love. - New technology matches couples based on the genetic components of their immune systems and body odor. - Study participants submitted cheek swabs. - Those with similar immune systems tend to not be attracted to each others' odors.
"The alleles of my Major Histocompatibility Complex are completely opposite from yours," might not sound like pillow talk, but it is the literal basis for the "chemistry" many couples have.