what's the magic word?

Ub
Should "please" be taught as a *magic* word? 
Are people obligated to say yes to a request if the person says? Please?
My opinion-please is not a magic word, just good manners. Good manner will get you good manners in return. Not what you want. I feel like this could be a reason why so many men convicted of rape had a problem with no. "Well, I said please." "I asked nicely." 
Why do you agree or disagree?