I think that marijuana makes you stupid but sensual. I've watched many of my friends and loved ones become more erotic and dumber - just going around with a glazed expression on their faces from their last orgasms to the next - and found them really quite boring.
You realize that especially when you're writing a book like this, looking back on your life, that there's just such a depth of understanding you acquire over time with the help of the people who love you that that's when you can really get down to what you really think and believe.