Part of the problem I have with OF is that a lot of the messages are along the lines of, "Oh baby, wouldn't you like to be here right now? What would you do to me if you came home and I was lying on your bed looking like this? Would that turn you on?" and I am WAY too logical to react to that, because my thought process goes like:
1. Well yeah, of course I'd like to be there right now. Would you ACTUALLY want me there if I wasn't paying for the chance to see you naked? Let's consult the magic 8-ball *shakes vigorously*, it says "All signs point to no" and then laughed at me.
2. If I came home and you, a stranger I didn't invite into my home, was waiting on my bed I'd be calling the police, for my safety and yours.
3. If I knew you, but we weren't dating, and I came home and you were in my room uninvited, I wouldn't call the police but we would be having a very serious conversation while you got dressed about why you felt the need to do this, when we weren't together.
That being said, I also don't logically get the whole "let's video chat while we both masturbate!" trend. If you're in a relationship and you can't be together physically for a while, I completely understand. Two strangers getting off while watching the other one makes no sense to me (not kink shaming, if that's something you're into and you're both consenting adults, get your freak on).
So yeah, I'm too logical to be able to "let go" and fantasize like that (and, it also keeps my costs WAY down and I honestly don't know why some of them still reach out to me, even if it's on the "free" pages), but obviously some people are, otherwise they wouldn't waste their time (and mine) pitching that fantasy.