It's so funny because when you do smoke weed and write a song, you're like, 'Yeah, this is brilliant, this is excellent!' - and the next morning you go back and often find that really it's not very good at all... I've never done anything like acid or cocaine and I hope I don't. But I guess you have to try things once in a while... just once. I think you have to be very wary of falling into that trap of getting addicted.
About smoking cannabis.