My 3 cents to paps who pervertedly took this pic: if some old loons choose to age disgracefully,let it be. It's only your pants you need to zip.
(Toe-curling: Sting shares an intimate moment with Trudie at Sydney Harbour)
It's enough to make anyone's toes curl.
Not content with sharing their intimate tantric sex secrets with the world, ageing rock star Sting and Trudie Styler, 53, decided it was time for a more physical demonstration.
As the couple lazed around on the deck of their yacht in Sydney Harbour, the 56-year-old singer began to lovingly massage - and then lick - his wife's feet.
Trudie, who was lounging full-length on a seat, seemed unperturbed by his display and barely raised her eyes from her book.
However, their antics did not go down with onlookers.
One witness said: "He really put his back into it - you could see his tongue and everything - and Trudie was lapping up the attention."
(Onboard ship: The couple are enjoying a New Year break)
The couple are spending New Year aboard the luxurious Phoenix I yacht - which costs £5,500 a day to hire.
Notorious for their liberal approach to sex, the pair recently flung open the doors of the £12million Manhattan apartment for an "at home" newspaper feature - with eyebrow-raising results.
The centre piece of their sumptuous 18-room residence overlooking Central Park is an extraordinary scarlet bedroom embroidered in gold and dominated by two explicit Helmut Newton prints.
(Outspoken: Trudie and Sting have never been shy about their sex life)
In one, an unidentified woman lays virtually naked, with her legs spread in the back of a vintage Mercedes as a man leans over from the front seat to unzip one of her spike-heeled boots.
The other image, above the bed head, shows the lower half of another female wearing just stockings, suspenders and high heels.
Miss Styler, who once told a U.S. DJ that the couple enjoyed swingers' parties, before apparently retracting the claim, said of the room: "I find it hot."
(Artistic licence: Trudie Styler says the artwork in the couple's bedroom makes her feel 'hot')
