Long -long back in 1960-s after I  became a doctor  and  learned through Boyd's  Pathology Book that our body can accumulate from 500 m  to 1000 ml of fluid (water in  our system without giving  ant symptom  or sign clinically nor even a sign of  fluid accumulation in  costo-phrenic angle  to prove fluid in Pleural -space by X-ray of chest ( may not very  very accurate in my statement after about half a century i.e  today.
 But the interesting parallel I venture to draw is that : also  long after, I  studied a book  named Charak Sanghita  of AYURVEDA, i.e the knowledge  about LIFE and Health of INDIAN  VEDIC  period  (older than Even GREEK  CIVILISATION,)  where it was advised  for women who became pregnant , to wear a ring around the little toe the  foot (?left). And if the  lady  reported any feeling of tightening around, it was a sure way to know that water was getting accumulated in the body , That  was the first symptom & sign of  oedema or body-fluid Excess, when ,as proved in Modern Medicine, the Excess- accumulation of fluid was even  less than 500 ml in the  body.

What ?-- if in Modern days of Hypertension, , Circulatory diseases  or Kidney conditions, -if all men and women are advised to wear a ring around one of the little  toes!
Well this  is only the aftermath of my stray thought and is - no SCIENTIFIC  SERMON.

As  Medical students  we were told that;

'SIPHYLLIS' ,the most dreaded  Venereal  disease of  EARLIER  days, was  a GIFT  of the WESTERN  CIVILISATION and  known as  "ROYAL  DISEASE.'
Of course ,in Modern days , it has lost place to AIDS(More things to come ).
The other Dangerous habits  in the  name of   LOVE and AFFECTIONS ,-are  also WESTERN HABITS  e.g Kissing  and Hand -Shakes.{ the easiest way to get infected through   'Contacts' by  germs and Viruses.-------..

Even to -day,  the words of my great professor of Anatomy Dr. Pashupati Bose [only M.B.B.S} of Medical College Calcutta , India,  reverberates in my ear ,: " YOUR  ANUS  is Cleaner than your mouth and 'Normal Urine 'is better  than so-called drinking water , in terms of  germs , contained in it."

All  apart, Science  now tells that 'Hand-shakes ' can spread  VIRUS  faster than than many other means !
And it has been advised by SCIENCE-World (reported recently) to prefer   ELBOW-SHAKE' to Hand-shakes.
Strange  !  How are  opinions ,- Changing or  Evolving  in rapid progress..
So!  &  Finally ,- think twice  before  the  Kiss or be close  to any one , even Face-to-Face ..