Jessica Simpson has ruled out any possibility of a reunion with ex-boyfriend John Mayer after he revealed all about their sex life in a candid Playboy magazine interview.

The singer/actress was left stunned and "very disappointed" after Mayer compared Simpson to "sexual napalm" and admitted he would happily pay to sleep with the busty blonde.

Mayer revealed his ex was "crazy" in bed and admitted Simpson was like a drug, adding, "That girl is like crack cocaine to me."

Simpson has refused to accept his personal apology but recently confessed the rocker will always have a place in her heart.

She said, "Normally you'd think someone you care about would keep those details to himself. It was definitely a compliment, in a way. I don't really want people to know that about me. I'm like the good girl, then that happened... He gave away my game.

"(But) I will always care about him. I think he's a great person, a great musician, but I was very disappointed by the article."

Simpson confesses the Playboy interview wasn't the only "stupid" thing the rocker has done, saying, "I thought he was stupid for breaking up with me."

And she insists Mayer has blown any chance of reigniting their romance anytime in the future.

She adds, "He'll never have this napalm again!"

The former couple split in 2007 after nine months together.

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