In this interview
with Paul McCartney, McCartney takes credit for introducing Mick Jagger to this song: "There were two songs I turned Mick onto that the Stones have done. One was She Said Yeah and the other was Ain't Too Proud To Beg. Mick would deny it - 'Wot? Never saw him, never met him' - but I distinctly remember having him up into a little music room and playing it to him. He loved it and he went and did it. We've messed around with the track a little bit, but it is sort of like my memory of the original."