Puff the Magic Dragon

Puff, the Magic Dragon is the title of a song written and popularized by Peter, Paul and Mary in the 1960s. Believed by many people to refer to smoking marijuana, it became a hippie anthem.

External link to lyrics (http://www.webfitz.com/lyrics/Lyrics/1963/421963.html)

The song also generated many parodies and songs sung to the same tune. One (~1964) went:

Mary was a virgin,

At least that's what they say,

But I still think she got knocked up

That same old-fashioned way.