How many Beatles song titles begin with the word "Hey"?

The Beatles were an English rock band formed in Liverpool in 1960. With members John Lennon, Paul McCartney, George Harrison and Ringo Starr, they became widely regarded as the foremost and most influential act of the rock era.

The Beatles had two songs that started with the word "hey". "Hey Jude" is a song written by Paul McCartney and credited to Lennon–McCartney. The ballad evolved from "Hey Jules", a song McCartney wrote to comfort John Lennon's son, Julian, during his parents' divorce. In May 1968, John Lennon and his wife Cynthia Lennon separated after John's affair with Yoko Ono. The following month,Paul McCartney drove out to visit Cynthia and John's son, Julian, at the family's home in Weybridge. Cynthia Lennon recalled of McCartney's surprise visit: "I was touched by his obvious concern for our welfare ... On the journey down he composed 'Hey Jude' in the car. I will never forget Paul's gesture of care and concern in coming to see us."

"Hey Bulldog" is a song by the Beatles which first appeared on the Yellow Submarine soundtrack album in 1969. A few days before the recording session, Paul McCartney had played drums on a Paul Jones rocker called "The Dog Presides," which had featured barking sound effects. During the Beatles recording, McCartney started to bark without warning. The next lines, initially written as "Hey bullfrog" by Lennon, were changed mid-song to "Hey bulldog", which would become the song's title.