see adam thats theory number one.
theory number two is what i subscribe to. my theory is im so sloppy at doing work on cars that im going to need to run out to replace parts, or get more of whatever i need, so while im there ill buy the parts i need. haha.
one time when i was working on my civic i beleive i went to advanced auto like...3 or 4 times in 2 hours. the people working there were like:

or