Every one of us has, at some point during our adolescent lives, had a huge crush on a friend's elder sibling. It doesn't matter whether you're a boy or a girl, living in Peru or Sweden, or even what your sexual orientation is - this one's universal.
It's almost as if we think, "Okay, so you're my friend, and you need to pay me back for letting you be my friend. Let's see - you don't have cash, I don't take checks. But hey! You've got a sister! Let's see if we can work out a deal here."
And it's always an elder sibling. Someone who's about 4-5 years older than we. Somehow when you're 15, anyone who's 20 seems like the coolest person on Earth. After all, they've battled through all the tribulations that teenage life has to offer, and they've survived! Surely they can't be ordinary mortals.
Have you ever noticed how the younger kids in the family will always be the most popular ones? Why do you think that is? I'll tell you why - they've got the cool elder brothers and sisters to fall head over heels in love with. I was the elder of two kids, and my closest friend in those troublesome teenage years was an imaginary albino named Klop! That is, until he too got bored and left.
My younger sister, on the other hand, is the exact opposite. Most popular girl in school. I'm not trying to say that I deserve all the credit for that, but the evidence is indeed compelling. And it's not because I'm rich, good-looking or charming - I am none of those things. It's probably only because I can legally purchase alcohol for them.