I’m also a scuba diver and have also touched sharks while diving. They reacted in a similar way to a dolphin or a seal or any other large aquatic animal, as in

I’m also a scuba diver and have also touched sharks while diving. They reacted in a similar way to a dolphin or a seal or any other large aquatic animal, as in it all depends on how they are touched. If it’s a gentle “pet”, they don’t seem to mind. If you punched, poked, yanked, or some other aggressive action, then the response would be different. Also note, there’s many types of sharks and not surprisingly, some more aggressive than others. I can’t speak for GP, but I’ve never touched a bull/tiger/mako shark, let alone a great white.