The expression says blood is thicker than water, and truth be told, I can't think of many things in life more ironclad than the bond of sisterhood. I was four years old when my sister was born, and I was immediately obsessed with her. Almost too much — "Remember, she's a baby!" my mom would remind me when I got a little overzealous or rough. (I still like to think I was the reason she started crawling at an exceptionally young age, because I always placed her toys just out of reach.)
Over the course of the next 25 years, we would go through so many peaks and valleys together — new homes and schools, accomplishments and heartbreaks, loss of pets and loss of jobs, our parents' divorce, the birth of her children, and figuring out what it takes to be sufficient, happy adults. The ride wasn't always easy, and there are countless fights behind (and I'm sure ahead!) of us, but there's no relationship in my life like the one I have with my sister. For all the sisters out there, here are 15 very real reasons why they make life's greatest friends!