LaC said: Hm. They may not be actually copulating, but this is still sexually explicit. I'm not sure "sexually_suggestive" is appropriate in this case.
It can't be "explicit" if you can't see anything. Explicit means nothing left to the imagination.
I can see a big pair of tits bouncing up and down. I don't have to imagine them, as I usually do when I'm not looking at this picture.
Put another way, sexually_suggestive should be for pictures that depict something non-sexual (eg a girl eating a popsicle) in a way that suggests something sexual. But a topless girl bouncing up and down is sexual, even if you remove the suggestive element.
On an unrelated note, that shadow looks freaky. What's casting the shadow on her sternum? (If it turns out that she's just wearing a "nude suit", I will spit in your ear.)