No, really. There’s a study.
Shocker.
Abusive husbands aren’t going to be so upset now when they’re sentenced to anger management treatment. 
The difference between a drunk driver and a stoned driver:
A drunk will run a stop sign.
A pothead will stop and wait for the sign to turn green.
(An acidhead will simply appear on the other side of the intersection without having crossed it.)
I’m so mad I could -------- hey! Look at the butterflies! Wanna make a bong out of one?
If it was legalized and the employer discrimination against it was resolved, we might all be happier.
(Hey, its not like Marketing, HR, any senior officers, or any member of any Board of Directors of any corporation ANYWHERE ever has to pee into a dixie cup. Of course if it was Mandated that any companies requiring drug testing require it for All personnel drawing pay or salary w/o exception, perhaps industry might soften some.)
It also was associated with an increase in female-initiated violence among those already pre-disposed to it.
So if she wants the last Cheet-o, don’t argue with her.
Regards,
Shodan
Be careful of the assumption that a correlation implies causation.