All the good things that cannabis has done for the US of A

[eridani]

1. Taught my generation the metric system

Keys = supposed to be kis, or kilos.

http://www.metrolyrics.com/coming-into-los-angeles-lyrics-arlo-guthrie.html

Coming in from London from over the Pole
Flying in a big airliner
Chickens flying everywhere around the plane
Could we ever feel much finer?

Coming into Los Angeles
Bringing in a couple of keys
But don't touch my bags if you please
Mister Customs Man

[msongs]

1. don't bogart that joint, my friend.... nt

[appal_jack]

2. Hip-Hop took it to the next generation:

"Sixteen ounces to a pound, twenty more to a key. A five minute sentence hearing, and you're no longer free." -Mos Def

-app

[tridim]

3. Isn't that song about cocaine?

[eridani]

4. MJ used to be sold by the kilo. Cocaine, not so much n/t