Will he be offended if I ask him to be my Mr Right Now?

There is someone who I fancy but would never consider a serious relationship with him for reasons I prefer to keep to myself. However, I am interested in starting a friends with benefits relationship with him but do not want to suggest that outright for fear of coming across as a loose woman, do you think asking him to be My Mr Right Now would convey the message that I wan't no committment and do you think a guy would be offended by this i.e "Aren't I good enough to be Mr Right?".