Here's your recipe for success in life and love:
respect + appreciation = magic
We all know the correct answer is "please," and not "abracadbra," although it's true that no one has ever managed to pull a rabbit out of a hat merely by asking it nicely to cooperate (rabbit and toddler negotiations are likely similar in that regard). The reason that "please" is the magic word really comes down to respect. By saying "please," we show that we are requesting an action by another person for our benefit. Saying "please" is a way of asking permission to infringe on someone else's time and/or resources. Sure, the askee (if that's a word) can say "no," but a nicely used "please" can certainly increase your odds for a "yes." And of course, I am sure that you're already well-mannered enough to know that you must say "thank you," either way the cards fall. Showing appreciation for an action, or even for consideration, makes future magical moments MUCH more likely.
I promise. It works.