Tumblr: How do you send private messages to other tumblrs?

I don't like how your answers to the /ask page counts as a post. I want to be able to send messages to my followers with privacy. How do I do that?Tumblr: How do you send private messages to other tumblrs?
Tumblr doesnt have a built-in function like the one you use in forums. However, there are contact form widgets that allows you to display a button that once click pops up a small window with a contact form in it. The link below explains how to install it.Tumblr: How do you send private messages to other tumblrs?
I don't think you can ..