"Hi, would you like to sleep with me? If you say no, I'm going to do everything in my power to make sure you're unable to get a job in the field you want to pursue." And to be clear here, for most of these sex pests, that is not an idle threat.

There's a reason it's considered morally and ethically heinous to demand sexual favors with people whom you have power over, and if you can't understand why it's so heinous, then you do not deserve to have power over anybody.