Yes, I do believe I have heard old 60s divers say that touching a dog, before diving, could be dangerous.
Of course the only way to mask the shark attracting scent of a dog is with copious amounts of a punjent weedy smell......this would have to be smoked, naturally, to gain it's full effect. The weeds masking scent(we'll call it "weed" just to clarify terms) was to be passed from potential diver to potential diver-much like buddy breathing but instead with a grin and a chuckle. For it was known that with a single breath of this agent any Great White would be thrown into a cloudy sensory haze, and thereby the shark attack was foiled-and that made people laugh and giggle uncontrolably. It's only drawback is that it would initiate a pre diving diver feeding frenzy the likes of which have never been seen and usually resulted in no diving that day whatsoever. But no one seemed to mind-except for a dive organization called the DEA(Diver Eduacation Assessment?). DEA always wanted to know "Where did you get this training material" "Who did you get this masking material from(oopps, I decided I would call it weed would't I)" "How much "weed" do you have on you"
The 60s seemed to be a very crazy time in diving. Crazy indeed.