Slight tangent - the first pieces of sexually explicit writing I came across as a youngster were in the 'Jaws novel.
Some surprisingly vivid scenes and language in there, with a whole sub-plot where Hooper was enthusiastically banging Chief Brody's wife... And Quint's vocabulary was a little, er, stronger to be sure.... I recall one particular line as the shark breached and rolled away from them '
exposing its salami like claspers'
Quint shouts: "I see your c0ck you ba5tard!!" 
I don't suppose anyone else remembers reading it..?