I don't want to go off topic, but are you saying you're naturally skinny? Now I'm afraid I think 'if this girl on SG can become skinny, so can I' when all the time a lot of you are naturally skinny!
I don't know about naturally skinny, but I do tend to stay thinner... I ate a hell of a lot of food to get to 140 at 5'8" haha I'm putting in a lot of effort to get below the 120 mark