This is a very simple, primal fantasy. I am on a beach, in a park, etc., when two men come up to me and begin to become "familiar" without my permission. I am rushed to a more private (but still public) locale, and pushed to my knees. One man forces his cock into my mouth. The other gets my pants off me.

I am being used by them very soon, until they both unload their cum into my unprotected mouth and ass. During the event, I hear phones taking pictures and can see them photographing me.

When they are done using me, they put their cocks away and say "Be back here in a week, or your family sees the pictures. As insurance, we're posting these on a gay sex site, too."

Then they leave, and I pull up my pants and go home, both dreading and looking forward to being used again.

If this ever started to happen, it is likely that I could go along with it all the way.