I have never felt high at all from people smoking strong strains near me. I am a fairly big guy with a high tolerance though (i haven't smoked though).
> Beer on the other hand is odorless and your usage doesn't directly affect others.
This is not true at all. If I haven't been drinking or been around people drinking for a month or two, I can smell if you've had a beer just by walking in the room.
Weed definitely has a stronger smell though. But if you are used to the smell of weed and not the smell of beer, beer has a stronger smell.
It's you. I'm an average sized guy with low tolerance and contact high is a real thing. I wonder what effect it would have on kids nearby...
Personally I've found it to have an effect when indoors, even if there's an open window. (I don't live in an especially warm climate, though. Windows are not typically open all that far.) I had a friend who was a very heavy dope smoker and I'd often feel a bit stoned after leaving his house. Nothing major, just as if I'd had a few drags on a joint.
(I used to be a heavy smoker myself, years ago, so the sensation is quite familiar to me.)
I don't know why it's such a strange idea that this could happen. You are after all breathing in marijuana smoke. Second-hand or not, over a few hours it seems to add up.
Size/tolerance/strength-of-drug are irrelevant to contact high, but relevant to a second-hand inhalation high.
Given the nature of contact highs, strength of the odor of an inhalant might be relevant, but that's not necessarily related to drug strength.
AFAIK, second-hand inhalation highs are basically impossible other than lots of people smoking around you in an enclosed space which prevents dissipation.
Tobacco is worse. It's not going away.
> Another problem is contact highs, if your a non smoker you can literally catch a contact high from being in the presence of someone smoking a strong strain.
Would be really great if true, but is unfortunately a drug scare myth from the 60s.
And I'd hazard that it would be mostly the hydrocarbons, which would square with your experience.