Warning: Listing to Future's "Stick Talk" could give you this face (known on Twitter as #Phelpsface).
Eric Clapton wrote "Layla" about his love for Pattie Harrison, who was married to George Harrison at the time. He eventually married Pattie, and managed to stay friends with George.

Sea creatures mentioned in "Rock Lobster" by The B-52's include a jellyfish, piranha, bikini whale and narwhal.

Teen Spirit was a kind of deodorant marketed to young girls. That's where Kurt Cobain got the title "Smells Like Teen Spirit."

The Hall & Oates hit "Everything Your Heart Desires" has no rhymes.

Paul Stanley and Gene Simmons of Kiss wrote "Rock And Roll All Nite" as a "rallying cry for all of our fans." In later years, members of Kiss wrote songs separately.
"Dead Skunk" became a stinker for Loudon when he felt pressure to make another hit - his latest songs deal with mortality, his son Rufus, and picking up poop.
Untangling the events that led to the "Stairway To Heaven" lawsuit.
The lead singer/lyricist of The Beach Boys talks about coming up with the words for "Good Vibrations," "Fun, Fun, Fun," "Kokomo" and other classic songs.
A selection of songs made to be terrible - some clearly achieved that goal.
The drummer for Anthrax is also a key songwriter. He explains how the group puts their songs together and tells the stories behind some of their classics.
Howard explains his positive songwriting method and how uplifting songs can carry a deeper message.