No, duplicate posts are not allowed on the site. However, if you want to receive more responses on your questions, you can request to have your question featured for 750 xper points. This means that your question will be highlighted at the top of the Recent Questions page as well as on the Site Feed. You just have to contact the admins here www.girlsaskguys.com/contact and let us know which question you would like to feature :)
As the same question again and word it differently.
It is against the rules, especially if you repost your question in a short period of time. HOWEVER, you can feature your question for 750 xper points or you can update it in order to bump it on the live feed (which means more people will see it and respond to it).