It's fun to see here how hard people online try to force a 10 being the perfect girl. Fact of the matter is 99.99999% of the userbase here stand absolutely no chance with girls like that, when they all qualify for hard 2s and 3s if 10 is perfect.
You should probably look up the definition. Giving a girl 10 out of 10 is actually everything to do with sexappeal. But I would not expect anyone to actually do any research before throwing around random terms.