I know quite a bit about the Beatles. I'm assuming you have some point to make? Are you trying to say the Beatles were all Betas because of their divorces? Even if that were true, it doesn't refute the point I made about those lyrics.
I'm really not all that interested in labeling people, but John Lennon left his first wife to be with Yoko Ono, and she received a paltry settlement, so I don't see what's so "beta" about that. There's also a well known story about Lennon being at a party and banging a girl in the bedroom while his wife was forced to listen to the sounds along with the rest of the party. This led to the temporary split between them, with Yoko assigning her secretary to act as his concubine basically, until they got back together. Japanese culture is different than ours, clearly.
Paul McCartney's first marriage sounded like it was about as good a marriage as there can be, and it only ended because of her death from breast cancer. Unfortunately, I think because of that successful marriage, he thought his future efforts in that area were going to be as successful. And his second wife, Heather Mills, got a huge settlement from him in the divorce. However, it was less than 1/16th of his fortune. If you check out this link, you will see that the judge settled more closely with what he wanted than with what she wanted:
https://www.telegraph.co.uk/news/uk...ey-divorce-settlement-with-Heather-Mills.html
Maybe you're referring to George Harrison's first wife, Patty? George's close friend Eric Clapton fell in love with her. From what I've read on the subject, which included Patty's autobiography, George was banging other women and when Eric said he loved his wife, George just sort of "gave" her to him (how's that for a friend lol). She was reportedly angry that he didn't fight for her. So it sounds like it's far from simply a cuckold situation.
Ringo Starr and his first wife Maureen divorced after 10 years of marriage, he said it was because of his alcoholism and domestic abuse. He's been married to his second wife Barbara Bach for over 35 years.