What does the song "Dirty Second Hands" by Switchfoot mean? I know, I'm stupid, but clue me in.?

Question

Do the "second hands" refer to time? Why are they dirty? Do the "second hands" refer to something else?

Answer 1

Here is someone's interpretations:
http://lexcorpninja.vox.com/library/post/dirty-second-hands-song-analysis.html