Of course everyone has an agenda. I think it crosses over into "manipulation" when you knowingly advance your own agenda at the other person's expense. For in

Of course everyone has an agenda. I think it crosses over into "manipulation" when you knowingly advance your own agenda at the other person's expense. For instance, suppose I have a wonderful product people would love to buy, if only they knew about it. I would argue that advertising it wouldn't be "manipulative" as it is commonly understood, even though I am doing it for selfish reasons. But if I knew that the product was dangerous, or fake, or otherwise harmful, then that becomes manipulative behavior.