The image combines a placid view with a strongly, even weirdly erotic tension. What are the little green things flying out of the tree, above the statue? What's going on with that statue anyway? The woman is looking at it and not looking at it at the same time. The ad is selling sex, but it's not being very frank about it. It's also selling a notion of aristocracy and racial purity. But it's using a word--"creole" which is loaded with racial meanings--for many Americans, "creole" means half black and half white, which implies a taboo sexual relationship. The use of "medical evidence" softens the sexual implications, but the woman's ambiguous position in the ad is puzzling. Where is she? In the garden? Looking at a painting? Are we (the viewers) also in the garden? Are we her, or are we looking at her?
It seems like the ad uses a variety of oddly inconsistent details to present a message that's loaded with sexuality, but not in a very straightforward way. It may be using the idea of forbidden interracial relationships to spice up the product and associate it with desire.