Blog Writer for Dating Advice Site

My company has been in the dating advice industry for five years. We are starting a blog, and need constant ongoing content. Our plan is to build up a number of articles before launching the new blog, and we would prefer to keep the content to one or two writers. Each article will between [obscured] words, and must address contemporary issues of dating for both men and women. Content of a sexual nature is allowed, but must be as clean as anything you would find in the magazine Cosmopolitan. What I need from you is a quote of what you charge per article, along with a writing sample of no more than 500 words. This has to be an informative, interesting piece that could be found at a blog, but can be on any topic. I also need a couple sentences explaining on why you are qualified to write on the subject of dating. Thank you.