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WorldPlay in the Sand Day is celebrated on Thursday, August 11, 2016,” notes Cute Calendar.com. “Even adults may dig in the sand on this day!”

And we dig adults like Bo Derek who’ve kept their child-like enthusiasm for the slippery substance.

Sex on the Beach isn’t just a modern cocktail … the erotic allure of the seashore extends at least as far back as the late 1920s and early ’30s, when ‘Art Studies photography guides featured nakedstarlets in the sand on their covers and inside, often shot by legendary lensman Edwin Bower Hesser.

Indeed, it was a favorite backdrop for such ‘underground’ sessions, owing to the secluded nature of the venue. Hesser’s languid Ocean Sprites, published in December 1929, is one of the more sensual sand•ples of the genre.

“The whisper of wind over your skin as you dig into the fine sand,” Days of the Year waxes nostalgic, “brings back wonderful memories for many of us.” A totally nude Sofia Vergara brings back wonderful mammaries in the fine Colombian sand from when she was a budding starlet getting grains in her groin!

“One of the main attractions of a sandy beach,” observes Cute Calendar, “is playing with the sand {though we’d prefer playing with Sofia!}, as it presents more possibilities than an ordinary sandbox.” Madonna covers her crotch with a castle in this rare unpublished sandbox shot:

“Sand art is the practice of modeling sand into an artistic form” (above right).

“Originally,” according to one account, “World Play in the Sand Day was about making artistic sandcastles, and soft sculptures out of sand and water, but now it encompasses anything you do in the sand.”

“Many major beaches around the world hold contests for the best artistic works. Busts of famous figures, for example, are so intricately molded and shaped that they take your breath away!” The same can be said for the “bust of famous figures” that Sleuth has molded into his ‘Play in the Sand Day’ Dirty Dozenlaid out below …

BAI LING

CHRISSY TEIGEN

JAIME PRESSLY

KERRI WALSH – currently kicking butt {as opposed to cracking butt} at the Rio Olympics!

KATE UPTON

PAZ de la HUERTA

PENÉLOPE CRUZ

KATARINA WITT – perhaps the sexiest Olympic Gold Medalist ever!

JESSICA WHITESports Illustrated swimsuit supermodel, her list of lovers includes Sean Penn, Usher, Nick Cannon, John Legend, Ne-Yo and star athletes Terrell Owens, Willis McGahee and boxing champ Wladimir Klitschko (current fiancé of Hayden Panettiere)

HEIDI KLUM

ANNA KOURNIKOVA – the tennis beauty checking her bikini bottoms for sand at a St. Bart’s beach in December 2004 ranks as one of the greatest candid sequences of all time!

LISA MARIE – Two years before Anna, St. Bart’s was also the scene of Tim Burton’s foxy fiancée acting out ‘Sex on the Beach’ with Jeff Goldblum shortly after the director dumped her for Helena Bonham Carter! The duo looks exhausted after their sandy … and randy … climax!

THE END