Though I can’t dig up the issue to prove it, the backstory is supposedly this: In 1973, Creem magazine ran something negative on The Four Seasons, arguing that rock music demanded a “masculine arrogance.” Never one to stand for the besmirching of sweetness, Jonathan “I Was Dancing in the Lesbian Bar” Richman sent them a brief what-for.
For a reminder of what Richman does think of masculine arrogance, I added a little “Pablo Picasso” at the bottom. Though the tune was recorded in 1972, it wasn’t released until 1976 on The Modern Lovers’ eponymous debut. At the time of the letter, the band was still underground enough that the editor felt the need to add the explanatory note at the end.