he went out with his 16 yr old sis and 15 yr old brother and daughter in law gone two hours came in looking stupid and one was sweating the girl told me they picked up his friend and they smoked a blunt.What the heck is a blunt.And what should his punishment be re the car.I can't let someone smoking dope drive my vehicle Otherwise he is a good boy does well in school and has been accepted in a good college.Help