Mind you, Sir James Paget is well known for three diseases named after him. When "Paget's disease" itself is mentioned, it usually refers to his most famous one, Paget's disease of bone but he is also famous for Paget's disease of the breast and Paget's disease of the penis.
It has been said that a measure of how well a medical student knows his/her eponymous diseases is how many types of Paget's diseases he/she knows.
Another thing doctors and medical students sometimes joke about is that Paget must have been a dirty old man. Two diseases named after him related to ... erm ... sexual parts of the body ... therefore he must have been interested in those bits -- whereas "Paget's disease of bone ... yeah ... must have been a fluke".