"I know my songs when I go tour because I learnt them to go on tour, but actually I think there's just too many of them for me to retain them so I don't know them all," Sky News quoted him as saying.
The legendary singer said he still enjoys writing songs. He added: "Songwriting"s always a grey thing for me because it's a mystery. You start with a black hole and if you're lucky a couple hours later there will be a song there so, that mystery and that magic is still the same for me."
London (ANI): Sir Paul McCartney has confessed he cannot remember all the songs he has written in his life because there are "just too many". However, the former Beatle said he made it a point to remember his own tracks while touring.