It is odd. In my situation I became interested in poly because I am bisexual, and wanted a girlfriend. My husband wasn't too cool with the idea yet, so I waited. Eventually I found a guy I was interested in and my husband relented (and now embraces the idea). Recently I started crushing on another guy friend and find it silly that I keep heading toward more men even though it wasn't the reason for my poly adventure in the first place!
I think that it is pretty common for poly ladies to have male partners, but the men do not necessarily interact with each other in a sexual way. That would be the less common kind. I am finding myself very content with multiple male partners, despite my bisexual leanings and yearnings. I actually haven't craved female attention as much since gaining more male partners.
Have courage to continue this journey, for it holds nothing but lessons and wonders.