20 Health Related Articles Needed

I'm looking for an open-minded writer to work on 20 articles on various sexual health topics (personal shaving and self pleasure). Please make sure you're comfortable with this before placing your bid. These articles will be 400-600 words, original with no plagiarism and researched. I would prefer a writer whose first language is English, and can supply quality work with no grammatical or spelling errors. Please only bid if you can write fluid US english. I'm also looking for someone with experience in keyword rich, search engine optimized articles and keyword density. As well as being optimized for search engines, they should be interesting to our visitors. I will supply the writer with the list of subjects and assist her/him with the research material if necessary. Minor revisions should be part of your bid. I need these articles within 7 days. Please submit examples of your work and/or additional questions. Thanks.