Love only a maximum of 30 months?

Cornell University professor of psychology Tannieryi of love, Ms. Lu took three years to the United States 5000 pairs of 25 to 45 age group couples conducting a sampling survey, such data entered into a computer, and then through the relevant medical and psychological post-test analysis concluded that:
Between men and women have a real love, its time can only be maintained for 18 months to 30 months, over this time, normally does not occur each feel the other side rapid heart beat, palms sweating phenomenon; men and women to embrace when the intensity of the original were only about 35% and 25%; kiss the heat were only about 30% of the original and 35%. Meanwhile, the men and women watching each other's time than the initially reduced by about 15% and 20%, in particular, is a woman, even though Dianqi Jiao and beloved man show with the situation, its high degree of Hing Wah Street West than did a decrease of about 1 ~ 2 cm.
Tannieryi Ms. Lu pointed out that the love between men and women from the three brain chemicals dopamine, phenylethylamine and oxytocin excite it out, when the first affection between men and women, this three kinds of chemical substances projection out of the so-called excitement, unable to stop. But as time goes by, the human body gradually will handle this within the three kinds of chemical substances to produce a new anti-hormone antibodies, two years later, the role of three kinds of chemical substances will disappear, the freshness will be between men and women gradually disappeared, with the attendant instead of the blend of emotions.