"I smoked more grass than anyone you ever knew in your life," Kerouac snorts. "I came across the Mexican border one time with 2½ pounds of grass around my waist in a silk scarf. I had one of those wide Mexican belts around me over it. I had a big bottle of tequila and I went up to the border guard and offered him some, and he said, No, go on through, senor."
Kerouac laughed, remembering how that was.
"It should be legalized and taxed. Taxed. Yeah, 'Gimme a pack of marijuana!' But this other stuff is poison; acid's poison, speed is poison, STP is poison, it's all poison. But grass is nothing."
There's so much more in this piece, and it's sad and funny and very worth your time. You really should go read the whole thing.