Lots and lots of songs and movies tell us: There is one person in the world who is your soul mate. A person who understands you and completes you. If you happen to believe this or want to make fun of this theory (read: criticize this thinking) , I have something written/drawn and something sung for you.
On what if? Randall Munroe answers the question “What if everyone actually had only one soul mate, a random person somewhere in the world?” in a funny and witty way.
[…] The odds of running into your soul mate are incredibly small. The number of strangers we make eye contact with each day is hard to estimate. It can vary from almost none (shut-ins or people in small towns) to many thousands (a police officer in Times Square). Let’s suppose you lock eyes with an average of a few dozen new strangers each day. (I’m pretty introverted, so for me that’s definitely a generous estimate.) If 10% of them are close to your age, that’s around 50,000 people in a lifetime. Given that you have 500,000,000 potential soul mates, it means you’ll only find true love in one lifetime out of ten thousand. […]
Also there is the song “If I Didn’t Have You” from Tim Minchin which perfectly sums up this topic.