Couples' personalities converge over time to make partners more and more similar.
235
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Speed dating was invented by a Rabbi in 1999.
45
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Erotomania is a type of delusion in which the person believes another person is in love with him/her.
38
For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
41
Kissing an infection-free partner is good for your teeth!
141
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12