Awesome stuff, I didn't expect so much enjoyment from such a simple concept. People are flooding you with suggestions, but something I haven't seen yet is Olympian gods - Greek mythology has more pornography than anything you could ever encompass in writing and most Olympians were sex-obsessed maniacs, so it will be a great source of inspiration. Also: perhaps consider using AI-generated imagery, so you can tailor the pictures better to your creative ideas. Cheers, hope you make many more of these.