I treat my pen like The Pen
Kendrick is plucking a feather from Seinfeld. From wikipedia: “The Pen” is the twentieth episode of Seinfeld. The plot mentions “When Jerry asks Jack about it, Jack tells him that it can write upside down and that astronauts use it in space.” So Kendrick is saying the same goes his Pen when he writes because of his music love.
Accepting, but that is a stretch, but I love the idea. However, I’m pretty sure he’s saying he treats his ink pen like the Penitentiary — especially with the following line referring to famous west coast prison Pelican Bay. — 6x
To help improve the meaning of these lyrics, visit "I Love Music" by Tech N9ne (Ft. Kendrick Lamar & Oobergeek) Lyrics and leave a comment on the lyrics box