You know your addicted when... you can play every single rhythm guitar part. Every lead note, every bass part and every drum beat for nearly all the songs. And if that song should have a spot of harmonica or piano on it then by golly you know that too. Also you can play the bass cello parts on Strawberry Fields on your keyboards strings setting. If anyone sings the wrong note (even at a family singsong for example... Please Please Me) you say: "Your doing Pauls part. You need to stay on that E note for every word of the verse. Its called a cadence. Then for the bridge you go E, F#, Ab and then the last "come on!" is A. Whoevers doing Georges part needs to start on A then the last 3 are in C#. I'll do Johns main vocal... Oh sorry dad sometimes i forget we're just having a jam... Just sing it baby!"