ya, I kind of always figured that that is why you can't die from it. always a give and take.
good news though, if you ever find yourself so high that you can't get any higher you can remedy it by eating until you physically can't eat anymore, then watching a movie until you fall asleep. beating off before the movie is optional, but will definitely help you fall asleep faster. may need to smoke a little after to forget about how ashamed you feel, be warned.
really tho, I like weed best when I save it until evening and then take it a few rips at a time. seems to go farther when I savor it.