Why are there so many average looking girls who believe they are pretty?

What i have come to notice over the years are the number of very average looking girls usually in their early to mid 20s who thoroughly believe they are "pretty" even when they are a 6.5 out of 10 at the best. I dont know where this type of delusion comes from. Is it that young girls want to be pretty so bad that they actually believe they are pretty?

Why are there so many average looking girls who believe they are pretty?
Post Opinion