I've smoked weed less times than I can count on one hand, the hardest thing I did other than that was Mushrooms.
Aside from the fact that I couldn't pee for 4 hours, peoples heads looked like a picture out of the ring, and a 30 minute convo with a Gnome in the little outhouse/toilet paper holder; it was the fact that my cock shrunk so small it was literally pinky sized, that I came to the conclusion to never put shit in to my body ever again.