Why Don't We Do It In The Road Lyrics Meaning

This sing WHY DON'T WE DO IT IN THE ROAD is just a silly rocker that was done really fast with just Paul and Ringo. Paul said of the song that he saw 2 monkeys 'doing it' on the road in India.
"A male [monkey] just hopped on the back of this female and gave her one, as they say in the vernacular. Within two or three seconds he hopped off again and looked around as if to say "It wasn't me!" and she looked around as if there'd been some mild disturbance ... And I thought ... that's how simple the act of procreation is ... We have horrendous problems with it, and yet animals don't."

As far as other songs Maxwell's Silver Hammer , Max was NOT Kurt Cobain.
First of all, Kurt Cobain was BORN in 1967. The Beatles would have had NO idea who he was. So that is absurd.

Jude was Julian Lennon. Paul wrote "Hey Jude" for him.
It was about Lennon's divorcing Cynthia Lennon. That has been documented in the Beatles Anthology and elsewhere.

LUCY IN THE SKY WITH DIAMONDS,
Lennon's son Julian inspired the song with a nursery school drawing that he called "Lucy – in the sky with diamonds". Shortly before the album's release, speculation arose that the first letter of each of the title nouns intentionally spelled "LSD", the initialism commonly used for the hallucinogenic drug lysergic acid diethylamide. Lennon repeatedly denied that he had intended it as a drug song. He attributed the song's fantastical imagery to his reading of Lewis Carroll's Alice in Wonderland books.
Lucy was a schoolmate of Julian's. Lucy Vodden, the subject of a Julian Lennon drawing that inspired his father, John, to write the Beatles’ Sgt. Pepper’s classic “Lucy in the Sky With Diamonds,” passed away last week after a long battle with lupus. Vodden, formerly Lucy O’ Donnell, was 46. In a statement, Julian and his mother Cynthia Lennon said they were “shocked and saddened” by Vodden’s death, the Associated Press reports.

Lennon once said of the song Sexy Sadie "That was inspired by Maharishi. I wrote it when we had our bags packed and were leaving. It was the last piece I wrote before I left India. I just called him 'Sexy Sadie' instead of (sings) 'Maharishi what have you done, you made a fool...' I was just using the situation to write a song, rather calculatingly but also to express what I felt. I was leaving the Maharishi with a bad taste. You know, it seems that my partings are always not as nice as I'd like them to be."

Joseph See [JoJo]as in the song GET BACK, was Linda McCartney's first husband. They lived in southern Arizona and had a daughter named Heather. Joe was an archaeologist and travelled for many months at a time. He went to South Africa on a dig and when he came back, Linda had taken Heather and left him. She divorced Joe and eventually met Paul through mutual friends. They married and Paul eventually adopted Heather.
Joe never got over Linda and used to stay with the McCartneys when visiting his daughter.

Paul and Linda bought a horse ranch in Tucson, AZ.
Linda died there from breast cancer.

Just a few miles from See's home. Linda and Joe remained friends and would visit when in AZ.