Quasimodo goes to the doctors with back pain

The doctor tells him to remove his clothes, and he reluctantly agrees and starts undressing, and takes off 2 coats, then a jacket, then 7 jumpers, 3 tshirts, and reveals yet another coat...

The Doctor says "Hold on Quasi, hold on!", "why are you wearing so many clothes?"

Quasi says he never got undressed since the day the hump had appeared, so to hide it he just kept putting more clothes on top of the old ones.

The doctor asked "When did you start doing this?"

Quasi said "Back when I was at school"

The doctor said "Didn't you ever wonder where your damn schoolbag had gone!?"