Historically, sweat has been an active ingredient in perfume and love potions.
309
'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
255
Wearing red increases attraction.
30
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
The single biggest predictor of love is proximity.
30
Couples' personalities converge over time to make partners more and more similar.
235
Kissing an infection-free partner is good for your teeth!
141
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39