Blowing smoke into a dogs ear does work. The dog's ear is different from a humans such that it has no ear drum, just an Auditory tube which goes straight to the cerebral cortex. So marijuana smoke would pass through this tube directly to the THC receptors.
Keep in mind, in addition to the marijuana itself being illegal in most locations, this could also have your pet taken away from you as a form of abuse.
Also, just like there are some people that like the feeling of being high and some that don't, there is a good chance that your dog will not understand what is going on, and it can be a very unpleasant experience for him. It is not something that should be forced on those that do not have a choice.
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First, your dog will start listening to bands such as Pink Floyd, Led Zeppelin, Cypress Hill, Jimi Hendrix, Bob Marley, Afroman, Sublime, and Bone Thugs N Harmony.
Then, after your dog has listened to them for several months, it will appreciate every detail about the music. For Example, Bone Thugs N Harmony's Krayzie Bone is an excellent classical linguist, but his faster solos tend to sound like a bunch of random words. It still sounds good, but the writing could be better.
Only if the dog wants it to.
Not all dogs enjoy marijuana, but the ones who do usually make sure they're able to get some on their own.
If the dog walks away from you when you smoke, clearly he doesn't like it.
If he sits close to you and watches closely, try blowing the smoke where he can get to it if he wants it.