I've always wanted to do a poll asking if people ever got a "buzz" from nicotine, but I don't think the results would be valid.
I am convinced that not many people get a "buzz" from nicotine (even though some might) and that most mistake the carbon monoxide "buzz" as being from nicotine.
The simple fact that most electronic cigarette users don't get any kind of "buzz" says a lot.
But even that is confounded with the fact that most long-time smokers no longer get that "buzz" either, unless they haven't had a smoke in awhile.
When I think back to my first smoke, with the delectable Deirdre Domeyer, I remember a buzzing high. It was much later when I experimented with some gaseous entertainment frequently used as a propellant in dessert creams as an employee of Friendly's that I experienced a similar feeling. I did not make the connection until just now.
I think you are on to something, DC. That Oxygen 'meddling' could be more of the high than the nicotine.
Interesting...