Alfonso XIII of Spain had endless affairs, tons of illegitimate children (in addition to seven with his wife) and a sideline in commissioning pornography for his own private consumption
Being an only child is notoriously kind of boring, but you have no idea just how much you're missing out on! Twins have their own language, have playdates as early as in the womb, and even have a built-in, biological get-out-of-jail-free card.
Here are a few things you didn't know about your friends who get to hang out with their own clones: