Relationships Facts

Most people believe that the quality of a first kiss is a reliable indicator of how the rest of a romantic relationship will unfold.

One of every 8 married couples in the US last year met online.

Relationships that begin through 'mate poaching' - when someone pursues a person already in a relationship - show significantly lower satisfaction, commitment and trust, plus higher rates of jealousy and infidelity compared to relationships that started between single people.

On average a woman has 4 sexual partners in her lifetime.

Yawns are more contagious among people with closer relationships.

Kissing an infection-free partner is good for your teeth!

40% of people who are rejected in romantic love slip into clinical depression.

American men are most likely to cheat at income extremes—when they're completely economically dependent on their wives, or when they significantly out-earn them.

Thrity-five percent of the people who use personal ads for dating are already married.

Brain scans show that people who view photos of a beloved experience activation of the caudate - a dopamine-rich part of the brain's reward system involving motivation and desire.

The most collected calls are made on Father's Day.

The single biggest predictor of love is proximity.

Thomas Edison taught his second wife Morse code so they could communicate in secret by tapping into each other's hands when her family was around. He even proposed to her this way — tapping "Will you marry me?" into her palm during a carriage ride. She tapped back "Yes."

The average person dates 7 people before finding their spouse, though they may go on dozens of dates with each person along the way.

When two sets of identical twins marry each other and have children, those children are legally cousins but genetically full siblings, sharing about 50% of their DNA.

Happiness and stress are contagious; surrounding yourself with happier people will make you happier too.

In Japan, condoms are commonly sold 'door to door'!

85% of all Valentine's Day cards are purchased by women!

Psychologists suggest that hugging a pillow while sleeping may indicate a longing for intimacy, comfort, or connection with others.

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.

Seann William Scott, who played the over-the-top Stifler in the American Pie films, was extremely shy in real life and didn't have a girlfriend until he was 27 years old.

Wearing red increases attraction.

Intelligent men tend to be more sexually faithful.

In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".