Yertle The Turtle - Freaky Styley (1985)
Unlike any other song here this one actually tells a story! It's just about turtles. If a Red Hot Chili Pepper's song having a plot is shocking to you, you'll be comforted to know they didn't come up with it. The story is from a Dr. Seuss book, Yertle the Turtle and Other Stories (1950-51) and some of the lyrics are direct quotations from the song. This also explains why the song is more whimsical than most of their others. More importantly, it has the pure funk sound they band would lose as they evolved. The album was in fact produced by Parliament Funkadelic's George Clinton who no doubt helped keep things tight and funky. and according to Kiedis' biography it's Clinton's dealer you hear right at the beginning of the song, which just adds to the weirdness. It's also worth noting this the first studio album to feature guitarist Hillel Slovak. Despite being a founding member, Hillel left the band to concentrate on another project just before they recorded their 1984 debut Red Hot Chili Peppers. It is also the last including drummer Cliff Martinez.
Naked In The Rain - Blood, Sugar, Sex, Magick (1991)
BSSMK is the second album to feature John Frusciante on guitar, Frusciante both knew and was heavily influenced by Hillel. This made Frusciante a natural choice to replace Hillel after he died of a heroin overdose in 1988. As the band developed in the years following, their sound took a heavier, but still funky sound. Naked In The Rain is great example - a funky bassline is very prominent but the song is driven by a distorted guitar. To be honest, a lot of the song is pretty normal - most of the verses discuss feeling like you don't fit in. That's bread and butter for alternative songwriters, even if the reference to Dr Doolittle is a bit out of the ordinary. But that doesn't hold a candle to being naked, out in the rain, and licking a killer whale so the song has to be included.
Pea - One Hot Minute (1995)
I think it's fair to say whenever I see a short track on an album I get suspicious. Pea is the shortest song on this list at 1:47. It opens weirdly: 'I'm a little pea,' then it gets contradictory 'And I'm a pacifist / So I can fuck your shit up,' only to contradict itself again 'Big and tough and macho / You can kick my ass.' Adding to the weirdness the sudden, violent lyrics is the instrumentation: raspy vocals and a slightly dissonant guitar riff. The riff is played by Dave Navarro, who replaced John Frusciante in 1992 halfway through the BSSM tour as Frusciante struggled to cope with the success of the band after two hit albums. I still haven't got a clue what's going on in this song and it's the only one here I don't really like, it just feels a bit pointless.
On Mercury - By The Way (2002)
Frusciante returned to the band in 1998 and shortly followed the band's most successful period seeing back to back releases of Californication (1999) and By The Way (2002). There music became more melodic, and lost a lot of the 'edge' that characterised their previous albums. The sound clearly worked for the band, and I really like this track, it's upbeat and still features strong if less funky bassline, but the lyrics are strange. They occupy a sort of uncanny valley somewhere between utter nonsense and storytelling. There is a vaguely consistent theme of coming to term with - things the 'masochistic hold,' 'reverse vertigo,' and the pregnant girl. But this consistency comes from direct repetition more than anything else. Add in the surreal imagery of 'Lemon trees on Mercury' and a 'motor mouthing off' and you're left with a very weird song.
Especially In Michigan - Stadium Arcadium (2006)
Now, I quite like this song, it's very simple for the album, a few guitar tracks, then just drums, bass, and vocals. Frusciante's playing makes the song - his tone fills out a lot of the sound stage and the solos are good, especially the one around 3:30. But what on earth is going on with the lyrics? It opens ok, pretty standard nonsensical but poetic lyrics. Then all of a sudden 'A rainy Lithuanian / Who's dancing as an Indian!' and the frightening image of 'The cleavage of your pillow skin / Is moving like a violin.' It all gets a bit weirder than usual, even for a very weird album - Stadium Arcadium was their most experimental album. Sadly, it was also Frusciante's last Red Hot Chili Peppers album and the band as a whole went on hiatus after finishing the supporting tour.
RHCP came back in 2011 with a new guitarist, Josh Klinghoffer, and an new album, I Am With You, which they followed up with The Getaway (2016). I have to admit I haven't listened to either extensively so if I've missed some really weird ones on there I apologise!