I think I can add something to the talk about addiction and a spouse who was able to quit smoking cold-turkey, which my now ex-wife was able to do while she was pregnant 15 years ago...
Drugs are a way to modify our dopamine, not a perfect way, but we learn to do it somewhat...which is why sometimes a cigarette really satisfied, and sometimes not.
Drugs are probably illegal for the same reasons the Catholic church says don't .........e - because it's not a pathway natural to our species - the most natural pathways to our dopamine come from interactions with other people. I've come to the opinion that relationships, Zen "Mudita", and prayer are the most natural pathways we can develop, but all of the others are human behaviors, just not accepted perhaps because they are us doing something more or less by ourselves for ourselves, and that there is a slightly annoying element that people recoil from when they see us not needing them. Of course, we do need them, but if it's not giving us what we need, or we've somehow blocked out part of the experience, the dopamine part, from our interactions with them, then we experience a deep but low level sort of withdrawal, which has been termed in psychology, "Reward Deficiency Syndrome."
It is important to know and understand our dopamine experience, that what happens in between our ears... it's all us. Dopamine is a trick we learn to do inside our own heads, and if we lack experience with it, or block it, we can expect to develop pathways that are addictive and complex, and never quite give us what we really need. Self-medicating is replacing what comes naturally with something that does not.
It's also important to recognize that of all the methods of self-medicating available to us, and we are stuck re-using narratives available to us through our cultures, vaping is less harmful to the individual and others.
To the OP: you may want to avoid doing it in front of your spouse, and treat it like a real cigarette in that way. Your pride in finding a non-destructive way to self-medicate may rub people the wrong way, and tend to separate you instead of bringing you closer together.
Dr. Gabor Mate's narratives helped me to see these things more clearly, but I've taken off with them after doing a lot of research. Oh, and my wife divorced me after my ADHD diagnosis, so...be careful of what you say and do that isn't along the lines of what the relationship is supposed to be about (relationships are a test-tube for us to learn and refine our dopamine abilities, IMHO).
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And, that's five - back to the Modding threads, whoopie!