Hi
I have a lot of problem with the pain in the butt thing! I also put it down to being skinny! I normally keep getting up and moving around even when on the computer but still doesnt stop the pain. I go college 1 afternoon a week and the chairs r awful its excrutiating (tried sitting on my nice soft coat but wasnt that much help). I know some of u do a lot more study than me mine is only part-time, i dont know how u manage it!
take care
heather