I have read a book talking about monogamous relationship. The book has a paragraph:
Nevertheless, few men like sharing their women, and many do not mind having one woman at a time if she happens to be great — not only drop-dead gorgeous, but also lovely to talk to and spend time with, both in and outside the bedroom. But most males are in long-term monogamous relationships because they have managed merely to find a female, not because they have found the female.
In the book, the writer said that monogamous relationship is not natural, and many men are in long-term monogamous relationships because they find it to to be a way to make their female stay and be faithful. But I don't understand the difference between "a female" and " the female" in this paragraph. Can anyone help me?