I can sync media files from Windows Media Player to my ipod, but the information will not show up on my ipod. Why?

I HATE using iTunes (it's a pain in the bleeping arse) so, despite what someone from Apple told me, I tried to sync a song from Windows Media Player onto my ipod. The sync appears to be successful, and yet when I ejected my ipod to check to see if the song was on there, it was not. Why? And how do I get it on there? I want to avoid using iTunes at all costs.