"I think weed is a fine thing... (but) I don't use it socially because it does not improve my socialising skills. And I never, ever smoke unless it's the last thing I do that day because there's a long period of stupid that comes after it that's pretty useless. You don't need it, but every now and then it takes you to a different place." Writer/filmmaker Joss Whedon occasionally experiments with marijuana to advance movie and Tv ideas.