remember the first adult joke i was told when I was in junior school
it was about a bloke who was having an operation, but during the op teh surgeon dropped a pound of cheddar in to his body
after the op he got an erection whenever he saw a cheese sarnie

the punchline as it was delivered was "you know how your willy is supposed to go hard whenever you see a naked woman? well whenever he saw a cheese sandwhich he got an erection"

was it different post internet age?
this was the 70's when we thought radio 1 djs were perfectly respectable people