There's a lot of friskiness going on in Rod Stewart's family and they're not afraid to admit it.

Rod's son Sean says he is amazed by his father's insatiable sexual appetite.

The 25-year-old is impressed by his legendary lothario dad and admits he can't match the British rocker's stamina in the bedroom.

Sean said: "My dad doesn't stop banging. He's like a bunny on steroids. I don't know what to do."

Sean - who is currently appearing in the reality show "Sons Of Hollywood" - also joked he finds it hard to remember how many siblings he has.

Rod, 62, has seven children from five different women. The youngest of the singer's brood is his 14-month-old son Alastair, his first child with fiancee Penny Lancaster.

Sean - whose mother is Rod's first wife Alana Hamilton - recently admitted he used to lust over his former step-mother Rachel Hunter.

He told Howard Stern: "I used to stare at her when she was down by the pool sunbathing naked. I was like 15 or 16 and I was sitting in my pool with a bottle of lotion."

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