look here first

The problem with rating women with numbers, is that they don't follow a normal distribution. Women are valuable. You won't find many 5/10s. A 5/10 is actually a 7/10, considering how much they are wanted by women and adjusting their "score."
No reason to assume a 5/10 women has 50% of women uglier than her or 50% prettier than her.

This isn't even getting into the millions of reasons why using an umber is stupid, but hopefully the idiots who still rate women like that will understand this.