Gratuitous Nudity...
Why is it Chuck Heston spent a third of the movie shirtless? In "Apes" there was a logical reason for it, but the man didn't have a great physique (which is particularly evident when seeing his more chiseled "Apes" replacement, James Franciscus, and an outright embarassment when compared to successor Will Smith) and yet he seemed to go nipples to the wind at the drop of a hat here.
Furthermore, we have a wide scope and a beautiful naked woman who emerges from bed and closes the curtains. What should have been an artistic shot is instead akin to cheap voyeurism, then she spends the rest of the scene still nude and buried in the background. Felt kinda like MGM was saying, "We're hip, we've got naked chicks in our pictures now," when in fact they weren't comfortable about showing female nudity at all.