We are the outcome of sex. Many dreams show how we gain much of our identity out of our sexual relationship or lack of it.
People often feel that they are inadequate or lack personal worth if they are not in a relationship where their partner is not sexually fascinated by them.
As suggested in the entry on individuation, our sense of personal value and positive existence, may be built on many things, but can ultimately become less dependent upon particulars such as physical attractiveness or sexual partnership.