Debbie Tideman used to sell lingerie at parties in the southwest suburbs. Giggling over oils and frilly things, the women asked her questions about sex.

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So she told the women about what she calls the X-spot, which she says she and her husband of almost 20 years discovered by accident when she had an orgasm that shook her from “the knees to the midriff.”

“I just felt this feeling of fullness,” she recalls. “I didn’t know where it came from, so afterward I had him show me with an avocado, which is shaped like a uterus.”

Tideman, who attended the College of DuPage for a couple years and helps run her husband’s construction firm, now bills herself as a “sexpert” and “the lady who put the X in sex.” But she admits she lacks credentials. “I never planned to write a book,” she says. “My plan was either politics or religion. Instead I went into sex.”