This song was written by Nicky Chinn and Mike Chapman - neither of whom were members of Sweet. Instead, Chinn and Chapman were a major force in the British pop music industry in the 1970s. Just as in the US, Leiber and Stoller became known for "the Brill Building sound," Chinn and Chapman in the UK became known as the "Chinnichap" sound. They produced songs for Suzi Quatro, and British bands Smokie, Mud, Racey, and The Arrows. Chapman would later produce albums for Blondie and The Knack, and along with Holly Knight, wrote Pat Benatar's hit "Love Is A Battlefield."
"Little Willy" was Sweet's biggest US hit, peaking the charts at #3 when it was re-released in 1973. It was a non-album single, but went gold in the US and UK all by itself anyway. Critics in the UK dismissed the song as "bubblegum" and referred to the lyrics as "nursery porn." Sweet wanted to shed their bubblegum/ glam-rock image and become more hardcore, so they later turned to writing their own songs.
Putting this song together, Chinn and Chapman used a pounding drum beat popularized by Slade and producer Mike Leander. They mixed in the riff from the Who song "I Can't Explain," and added the exceptionally catchy chorus, which dug into your ear and wouldn't let go. The song didn't tell any kind of story - just that Willy won't go home - but listeners didn't care and with Glam Rock, the lyrics weren't supposed to make sense anyway.
Les from Joplin, MoSweet had 4 Top 10 hits in the U.S., but "Little Willy" was their first and greatest.
Zabadak from London, EnglandLittle Willy was the band's 5th hit in the UK. Up to and including that song, they did not play the instruments on their A-sides but hey wrote and performed on the flips. These usually had a harder, rockier edge than the teenybopper-friendly chart fare and this schism would eventually drive some of their fans away, especially at gigs, where they tended to play lesser-known songs in favour of whatever was bothering the Hit Parade at the time...