I think my boys' school upbringing has never really left me. Even in my most refined moments, 'poo jokes' will tend to make me snigger, although I usually wilt under my wife's disapproving eye at such times. I would certainly draw the line at Benny Hill and 99.99% of all sitcoms.
Rafferty's disappearance very near the end of his life still has an aura of mystery about it. There are tales of a posh London hotel room being so trashed, that they had to gut it and start all over. There are tales about him retreating to the Tuscany countryside for solace. It does appear that he spent time with a lady he was very fond of, and there were some signs of recovery (he was undergoing total organ failure) prior to a resurgence of the symptoms which ended his life. He seems to have been a complex and gifted man with a self-destructive bent.