Telling and asking are essentially the same thing when you’re looking at just the words. There’s “Hey pick that up” and then “Could you pick that up please?” They only differ by a couple words right? So why is one so much more powerful than the other? Well as you might have guessed it’s not the words, it’s how you say it.
It is a fact that humans communicate around 10% in words and 90% in tone and body language. Now if you say the two previous phrases aloud you should notice that when you ask (“Could you pick that up please?”) it sounds weak and just all around crappy. When you tell on the other hand (“Hey pick that up”) she is doing what you told her to. You’re demonstrating that you are a leader and that is attractive. She won’t consciously notice the difference, but she’ll feel more attracted to you just by how you communicate.

Examples of what NOT to do:

“Hey bitch, suck me off.”
“C’mon baby, please, it’ll feel so good. C’mon, I love you babe.”

The first one is obvious, and though it can work on certain types of girls, try to stay away from it (for the most part).

The second is pathetic. If you say stuff like this slap yourself… hard. It’s bad because you give her all the power, and now she knows she owns you. Don’t be surprised if she shows up with a leash and a doggybowl next time you meet. If you stay in this mindset the only time you will have sex is when she wants it. When that time comes it may not even be with you. The first is a better alternative. Seriously.