Yeah, wax is definitely a cleaning mechanism, and in theory is supposed to move dust and dirt out of the ear but for some people it just builds up. Cotton buds are actually fine as long as you don't go jamming them right in there, I've seen so many cases of bleeding canals and a few cotton tips which have fallen off and gotten stuck down there, gets infected and gross

If you get heaps of wax, I wouldn't recommend buds either as they definitely cause wax impaction.
Hehe at the Shrek candle, I love those movies.