Argentine filmmaker Armand Bo carved out a memorable cinematic niche for himself in the 1960s by directing his supermodel wife in a series of unabashedly trashy B-movies. Desnuda en la arena (1969) is arguably the feather in Bo’s cap. The vivacious Lady Bo--ex-Miss Argentina Isabel Sarli--dons evening gown, string bikini, and birthday suit in a mostly plotless feature that brims with sun and sex. Sarli’s irresistible jugs are ripe for ogling in a couple of seductively lit strip-show scenes.