(In my solipsistic view of the world, only certain runway and print models warrant a 10. And that only while they are in their working prime.
For such a rating to be truly believable and worth anything, something approaching 90% of men would have to agree that 3,000 years ago in the barbarous forests and plains of Africa, Europe, Asia before hearing about the Ten Commandments they would have readily killed more than one other man to obtain permanent sole erotic possession of the woman in question.
I have never met or seen a picture of a woman working as a prostitute who rates a 10 on sheer physical prescence alone. Not that there may not be some high end women out there who merit such a rating, but even the pictures of high end agency women I've seen rate, at best, a 7 or 8.
For that, I might have knocked another man out 3,000 years to enjoy a single night's pleasure; provided, of course, that I was really in the mood.
[Note: While such a viewpoint clearly leaves the overwhelming majority of sex workers hovering somewhere between a 4 and a 6, it also has the benefit of being more mathematically correct in terms of application of a normal bell curve.]
Which is not to say that a woman who rates only a 4 or 5 cannot be more driven to have sex with many different men. When such a woman, in her own view, has no other choice and is compelled by her entire life's circumstances to behave thusly, she will, in fact, usually be superior to the ostensibly better looking woman as a paid temporary sexual companion.
My point: Where can a man, such as myself, find a truly obsessed yet stable young woman in her early 20s who is a real 7 or 8 for between $500 and $1,000?)