This song is more significant-- if at all-- for its music than its lyrics, which are either off-handed or half-hearted, depending on your level of generosity.
The bright spots are the inventive rhymes: "jungle/hungry," "write me/brighten," "sign/iodine." Also, the device of rhyming the end of one line with the middle of the next is quite clever.
Musically, the song hearkens back to earlier rock sounds while its loose ranginess looking forward to Simon's international explorations. And then the whole ending is rapped.
The notion that this song is aimed at Garfunkel-- that he left for Mexico and refused to get in touch from there-- seems hard to prove. First of all, he sings on the track itself. Second, the song is framed as a request for correspondence from a lover, not a friend.
The album is so strong overall that it is hard to fathom how this number crept in. It's not as if there weren't other fun songs included, such as "Baby Driver" and "Customer." And "Bye Bye Love" covers the duo as far as sending a salute to the sounds that inspired them.
Place this one in the column with "Groovey Thing" and "Pleasure Machine" as the sound of a songwriter having fun and blowing off creative steam.
Oh, and the title was "borrowed" from a doo-wop song by a group called The Jacks.
(I did not expect to be able to post an "Impact" for this song, but I just learned that Olivia Newton-John covered it. I had to listen to that. So I can tell you that you don't have to.)
Next song: Song for the Asking