Lol, I've got you beat, I'm 5'8 115 lbs... I hate it. I feel like I look emaciated all the time, and I constantly cover my body up because I'm embarrassed of my spine showing. My veins also show, especially in my arms and ankles, and you can see all the different cartilages in my neck in most of my pictures. Gaining weight when you are naturally skinny is the biggest nightmare. My best advice to anyone who is naturally skinny and wants to gain weight is to start working out, start eating avocados, drink whole milk and eat bread. I've found a lot of really skinny people hate the taste of bread (like me), so I just pour balsamic vinegar and olive oil on it to mask the taste. Still, all this effort only maintains my weight, I would drop back down to my original weight of 105 if I didn't try to gain. It's just genetics... would be great if I was an endurance runner, unfortunately I'm not =(