In a 1972 Rolling Stone interview, Streisand explained how she progressed from talking about pot to smoking joints on stage.
"I'd take out a joint and light it. First, just faking it. Then I started lighting live joints, passing them around to the band, you know. I was great, it relieved all my tensions. And I ended up with the greatest supply of grass ever. Other acts up and down the Strip heard about what I was doing - Little Anthony and the Imperials, people like that - and started sending me the best dope in the world. I never ran out.
"Hmmm..." added Streisand, "I wonder if I should tell that story."