Adult Sex Position Articles

I am looking for 10 SEO articles (500 words) to be written which are each about a bondage sex position. The articles will be part of a bondage guide so should be informative and researched. Everything needs to be original and must pass copyscape. Strong English skills a must. Each article should be keyword optimized for the name of each position. The positions should be thoroughly explained in regards to how to do it, what situations would use it, the attraction of it, the skill level, etc. It should be a friendly read for people that are new to bondage or are looking for a new thing to try. Use the word "bondage" in your bid to be considered. I will provide a list of positions that you can choose from or you can find your own, as long as they are researched. My budget is $30 for ten articles. This means 3 dollars per 500 words. non-negotiable.