I tend to be reserved (old and lazy) and do not (can not) get into wild crazy sex anymore. However, I've always been more attracted to ads that resemble what would attract me in public. A classy lady with a slight wardrobe malfunction - particularly of the legs - will get my attention every time. And a bit of thigh while sitting well.....
There are some classy examples in this thread. Carrie Hillcrest has always been one of my favorites in this category. Nicole Preston (ret) and Heather Winston both had tastefully seductive ads. I could go on, there are so many good ones.