5 things you didn’t know about the beginning of a relationship:

• Science knows what predicts whether a man and woman will fall in love.

• Men prefer a woman to be 1.9 years younger than themselves. Women prefer a man 3.5 years older.

• Here are some interesting facts about kissing.

• It’s very unromantic to say, but the most important factor in who you end up with is which people are around you, not what you’re like or what you want.

• Here’s what you should look for in a marriage partner. Best personality trait for a spouse to have? Conscientiousness.

Join 25K+ readers. Get a free weekly update via email here.