I have heard that women cannot look directly upon the awra (private parts) of other women. Is this true? If so, is it haram for a woman to have waxing of the private area by a professional woman whose job it is to do so?
Yes, it is true. It is not allowed for a woman to look at the private area of another woman, unless there is a necessity such as a medical issue, for example. Therefore, waxing the private area by another woman is not allowed.