Sex Substitute by Eve Linkletter

'She was prey to all the lewd desires of the perverted sisterhood'

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Sex Substitute is the diary of a 35-year-old woman named Peggy, a 'butch' lesbian who has a thing for young lipstick lesbians, who keeps getting hurt and betrayed, often when a lover turns to a man, as we see in the first chapter. She's worried about being one of those old lonely dykes who chase young tail. Her rival and friend, a woman named Johnny who hooks on the side for money, tells Peggy that true love and ever-lasting lesbian relationships are impossible for women like them, and she should take the 'love them and leave them' route.