The most beautiful word!

One need not go searching for one's long forgotten, and by now, in complete tatters, dictionary. It's a simple word. Quite unexpected of me, really! To use or accept simple words at all! But I can't help it! The word commands respect, demands it! And so I obey.
I bow to thee, o great word! You are most stupendously brilliant and when you shine forth in all your glory, the masses can not help but be in awe of you! Can anyone be as magnificent as you? Not even close!
Alright, enough build up, I say. So here's the word. Drum roll please. NO!
That's it. That's the word. "No".
No, I am not kidding you. No, I am not out of my mind. No, this is not funny in the least.
I shall prove every statement I have made by giving you a few examples.

1. "What am I asking for? Make an extra copy of the assignment! Do it for me, please! Can't you do even this much for me? Are you or are you not my best friend?"
If (sigh!), I repeat at the risk of repeating myself, if the answer to this could have been "No.", nobody would be punished for doing another's work and nobody's friend would fail because he/she didn't know what the bleeding hell the assignments were about.

2. "Sweetie, I love you darling! You look so beautiful today! I just want to hug you. Can't we go somewhere private? I just want to show you how much I love you. This is true love! Don't you trust me?"
The answer should have been, "Bugger off, you stinking beast! All you bloody want is an easy lay. I don't buy your honey coated, charcoal words for one minute! Drop dead, twonk and rot in hell!" but a simple "No" would have worked too.

3. "My dear child, how can you be so selfish? You think only of yourself. Don't you ever think of what this will do to us? We have sacrificed so much for you and we are only asking you this in return and that too for your happiness! Everybody says he's good. Would we ever do anything to harm you? Don't you think you owe this to us?"
Now this is a tough one but can be handled by an emphatic "NO!" which would translate to "Yes, I'm selfish. I love myself, I know what makes me happy and I want that which makes me happy. I owe you, sure, but if that's all my life is going to be about, I wont ever live for me. You brought me into this world because you wanted me. Please don't blame me for all that you did. If you didn't want to do it, if you regret it now, you probably shouldn't have done it in the first place. If you had me just because you wanted something from me, you are wrong. Yes, you are wrong. I hope you will be happy because I am happy and not the other way around."

I rest my case.