Your brain won’t change just by being around cannabis. And you won’t fail your next drug test, either....
A warning: few studies confirmed that a
contact high was possible. However, most of these studies were performed under “extreme conditions,” which rarely occur in real life, like super-tiny spaces filled with crazy quantities of weed. So, yes, you can get a contact high if you share a telephone booth with Wiz Khalifa or if you perform mouth-to-mouth resuscitation on the Dabbing Granny.
But in concert venues or house parties, it’s unlikely.
Most contact highs are psychological. You’re around people acting blazed; you act wasted, too.
In the end, you can’t get high off secondhand pot smoke much more than you can get syphilis from secondhand sex or get smart from secondhand reading.