OK, the secret's out. Next time you get some gas about your pot use, tell 'em it's MMJ use to combat worms:
http://www.medicaldaily.com/medical-marijuana-and-aka-foragers-drug-possibly-curbed-intestinal-infections-hunter-335956
http://www.eurekalert.org/pub_releases/2015-06/wsu-wrs052915.php...