Okay, first port of call - I apologise for making the mistake of thinking that the use of commas in a list is rule rather than convention, not having left school I've not studied English at university. You're most probably from a different country to myself where the rules and conventions are different, so it may be that neither made a mistake.
Secondly - I apologise to Cristina if it sounded like I's calling you tedious, I just find it incredibly annoying trying to get through lengthy texts on my computer with my diminished eyesight.
Third - my name comes from something I once called my Dad (from whom I picked up some habits) and find making a fuss over nothing as tedious as long lists. I simply can't stand the idea of people holding erroneous or ignorrant beliefs in contradiction to fact - call it a compulsive need to educate. I just don't like people being wrong.

No, Christina, you only use "and" in lists prior to the last item, otherwise commas are used. Plus, I believe the point is to use it consecutively (in a row, right next to itself). Your example just put it (tediously) between things. You also said "your explaining" rather than "you're explaining". Just thought I'd point that out.