Design that aims to make users addicted is unethical. We must not released such design. We shouldn’t even create it in first place.
So if you’re trying to get someone to do something, don’t start by explaining the action. Start with why they should take that action. Explain what they’ll get out of doing something, and they’ll often be more inclined to do it.
They also tend to focus most of their brainpower on the beginnings and ends of sentences — but the beginnings are really where you have most of their attention.