Why does every Beatles song have the songwriter credited as “Lennon-McCartney”?

Literally every song has the song has the songwriter credited as “Lennon-McCartney”…why?

Did they actually write every song together?

This page is a permanent link to the reply below and its nested replies. See all post replies »

hunkalove · 70-79, M

They agreed to always share credit. And Lennon always goes first. Sir Paul begged Yoko to let him change the songwriting credit on "Yesterday" to McCartney-Lennon but she said no.