Today's Oprah was about "straight" women who enter into gay relationships later in life. Oprah wondered if this is because there's a shortage of men, and also wanted to know the deal with butch lesbians.
Her guest, Dr. Diamond, explained (patiently) that who women are attracted to has nothing to do with the availability of men. She then went on to explain the Kinsey scale, and how sexuality, for some people, is not as categorically cut-and-dry as gay and straight.
As for "women who really kinda don't look like women," Dr. Diamond said that the femininity or masculinity of one's mate doesn't determine how gay a person is.