Good Thinking
So, this person wished they had a twin. Not so that they could pull all sorts of weird identical twin hijinks. They wanted a 21-year-old twin so they could borrow their ID to enter bars. Let that sink in for a moment. This person wanted a twin who was of age so that they could use their ID to legally enter bars.
We’re just going to say it. If your twin is 21, then there’s a 99% chance that you, too, are 21 years old. We say 99% because some twins are born days or even weeks apart. Here’s a fun fact. In South Korea, you’re considered to be one year old by the time you pop out of the womb.