Jenny McCarthy: Being 'Good in Bed' Helps Relationship

She's an author, mom and activist, but Jenny McCarthy also knows the key to keeping her relationship alive with long-time partner Jim Carrey.

McCarthy tells "Extra's" Lauren Sanchez, "Keeping myself in shape and being really good in bed" helps keep things hot with Carrey. She adds, "And having true love."

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McCarthy, 37, and Carrey, 47, have been together since 2005 and the former Playboy Playmate (Playmate of the Year, 1994) is still adamant that they won't marry. "I did it. I failed. Done. Now I just want to be happily in love."