The reason I started doing drugs, alcohol, marijuana, DXM etc. Was merely to get fucked up and escape my life. I've since learned to use drugs to expand my mind, learn, and in general be more creative. They've changed my life for the better, but if I continued what I was doing when I first started.... I might have been really messed up.
Seems the only two reasons people do drugs is to escape life or improve life. If you can make it work for you "Party on Wayne" "Party on Garth".
I've always been an escapist, but when substance came into the picture (not heavy, but alcohol, weed and the occasional shroom trip) my creativity shot out the roof and I owe a lot of my songwriting to that state of being I love so very much.