I am fairly new to the world of bass. I got one for christmas, and have picked up fairly quickly (I think ). While I play, I find I have to take a quick break because my left thumb(the one on the fretboard) hurts too much, rather than what I figured would hurt: the fingers. Is this normal for everyone? Is it just my playing technique? Is everyone different? Do you have any suggestions to lesson or get rid of this problem? On a side note, who knows any good TAB sites other than www.bassmasta.net or www.ultimate-guitar.com ? Thanks for your time, it is much appreciated!