•It only takes 4 to deduce if someone likes you or not
•When two lovers looks into each other's eyes , their heartbeat synchronize
•Cuddling release natural painkiller
•The broken heart is not just a metaphor
•Taking the hand of the loved one relieves pain and stress
•Looking into someone's eyes can make both of you fall in love
•Falling in love has neurological effects similar to those of cocaine
