I know! I'm still in therapy over this! LOL! The truth about the tooth fairy wasn't as bad. However like everything else in life the inflation value for teeth has made parenting much more expensive! :-)
I wondered that when I was a kid... my parents told me they just left the back door unlocked for him so he could get in. That seemed logical to me. Years later, I'm now a Dad and when my kids asked me the same question, I gave them the same answer...and they bought it too. Haha
Didn't you watch the piece crap Tim Allen Santa Clause film? It explains it perfectly, as a chimney just magically appears temporarily when he gets into homes without one, and then it disappears when he leaves. Simple.
Santa just breaks down the doors of those homes without chimneys like a boss. He steals all their s***, while leaving a picture of his a** behind saying "Kiss it." Oh wait...that's what i do every christmas eve. I forgot. lol (joke)
As for the jolly old bastard saint nick, isn't he like magical and crap? So can't he like just teleport or something? I mean if the man has the power to manipulate time to deliver toys in one night, then teleportation should be easy. anyways that's my two cents.