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from www.usatoday.com – Shirley Jones is a real tell-all.

The actress, 79, who clearly knows that sex sells, is revealing some spicy stuff in the pages of her new memoir, which came out Tuesday. And while Jones, 79, details her career from Oklahoma! to The Partridge Family, its her marriage to Jack Cassidy that’s getting the buzz.

She describes the handsome actor and singer as her first lover and “sexual Svengali.”

According to an AP profile of Jones, the star writes of Cassidy’s impressive endowment, his attraction to both men and women (he had a pre-marital sexual encounter with Cole Porter), and their threesome with another woman.

When asked about the onetime romp, Jones replied, “Yuck.”

Jones also includes a tidbit about how easy it is for her to have orgasms!

Marty Ingels, the comedian who is her second husband of 35 years and counting, is taking it all in stride, says Jones. “Luckily, Marty thinks I’ve still got a beautiful body, even though it is old, and every now and again I take all of my clothes off in front of him and shake my (breasts) at him and he loves it.”