Andi,
When I left the JW's at 16, I went on an absolutely determined crusade to try all the illegal narcotics I could get my hands on. My JW upbringing had put these things (and of course, porneia, in all it's forms) on so high a shelf I simply had to climb up and indulge.
With all due respect to COMF and the organizations he mentions, these drugs do affect the brain and body in different ways, and can be handled with different approaches.
My experiences with cocaine were indeed that of a rollercoaster, tremendous highs and lows, with growing anxiety and paranoia.
The only reason any user doesn't drop it straight away is that the psychic dependancy is an absolute bitch. (Though nothing like the physical dependancy opiates create, it can be tough as hell.)
Pot is not even in the same league. When I got out of my destructive phase, I decided that I would just smoke dope, (I hear it now: Denial, Denial...) and I did go through the arrested juevenile stage that COMF mentions where it still seemed cool to be involved in seeking it out, buying it, testing it, but as I matured it all became rather boring, and eventually I dropped pot totally, not out of a need to do so or by any outside pressure, but by a lack of interest in it.
For several years, I couldn't be bothered toke at all. Then I bumped into some smokers cleaning their dope on the counter in the mens room at a concert, I asked if I could have their seeds, and since then I've had a kind of hobby of growing my own. I have other sources for seeds now, and I grow way more than I could ever use. I still have some of my original batch of '98 in my freezer. That might have something to do with the fact that the last joint I smoked was on my birthday, November 30.
But to come to the point, Andi, if a potential employer came to me with the job offer of my dreams, but it came with the proviso that I'd be drug tested every morning I wouldn't have any problem: The pot would have to go, and it would not be a problem.
If Dave feels that strongly about her pot use, he should present it as a delimiting factor (make or break) and Kammy will decide which of the two will make her happier.
Alternate Advice: Dave, (as far as we know) has no personal knowledge of pot, and yet has fallen in love with a doper. Dave ought to smoke a joint, go for walk in the park, come back and throw one into Kammy and then talk.
Eric