Well its because, even though it doesn't seem like he weighs that much at first, he is adding extra weight to your already small body that your it isn't use to so its causing stress an pains. I hope that helps you and good luck.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.