London (Agencies): Having a great sex life with her new boyfriend Paul Krepelka makes Jenny McCarthy stays in shape.

The 38-year-old beauty started dating Krepelka who is a sports agent after being introduced by her sister in December and the former Playboy model claims she has her new lover to thank for keeping her in shape, reportedly.

"I didn't have to work out before 35 but now I have to so it's treadmill, bikram yoga, watching what I eat and of course great sex. Lots of great sex," she said.