Yeah, but when you're fucking someone, aren't they going to be closer than 2 feet away? The size of the computer screen the pics are being viewed on will also affect the outcome.
I've got some pics at arms length, but I also have my hand on it, to give others somewhat of a reference. I also have some pics where the camera is a feew feet away. I have one with both hands on it (ps, my hands are somewhat small, only 6" when placed together). I also have a measuring pic.
I think I have all the bases covered that one can have. I'm not sure what a true honest angle could be.
P.S. I did find a position to lay on my bed where I swear I look 9". I thought about taking it and asking people what size they thought I was.