Robin Thicke: Key to Perfect Marriage Is "Lots of Sex"

Forget flowers and chocolate!

The secret to Robin Thicke and Paula Patton's successful five-year marriage is lots and lots of steamy marathon sex!

"It's the only way to keep everything on par," Thicke, 32, told reporters at Sunday's American Music Awards in Los Angeles.

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"My wife is an actress, a mother, and a wife and I am a husband, a father and a singer so we haven't seen each other a lot the past couple of weeks," he continued. "We won't see each other a lot until Christmas and it's very difficult, but the only thing that gets us by is having great sex together. There is never enough [sex]. When it does happen, it goes on for hours."

Thicke sure hasn't been shy about his bedroom habits with Patton, who will soon star in the fourth Mission Impossible film.

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In 2009, he called her his "sex therapist" and told Us she inspired his fourth album, Sex Therapy. For his latest album, Love After War, Thicke again drew inspiration from Patton, but this time for her maternal instincts. "Once you see what a woman goes through having a baby, you know what real compassion, understanding, patience is all about, so that's absolutely what the album is about," he said at Sunday's AMAs.

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But while the couple is quite active in the bedroom, Thicke says they have no immediate plans to give their 1-year-old son, Julian, a sibling.

"It's not something we are planning on doing," the R&B star told reporters Sunday. "I think anybody who has two babies…God bless you!"