Same Gender Relationships in TF Fiction

Hey guys. I was reading MTMTE and I realized that Chromedome and Rewind are more than friends. Yeah, I am a bit slow. I never really though TFs could be involved romantically (were Optimus and Elita 1 really an item? They cared for one another but didnt do much of it), since they are built and dont share our biology at all. And now I realize that not only can they be in a relationship, but one of the same gender. Is MTMTE with chromedome and rewind the first time a writer has written about two TFs sharing a relationship and being of the same gender?
-Burn edit-
This is a post that was made in the CW Devastator thread which spawned an interesting discussion that Billy-Jim and I thought should have a thread of its own. Keep it respectful.
-Burn edit-
This is a post that was made in the CW Devastator thread which spawned an interesting discussion that Billy-Jim and I thought should have a thread of its own. Keep it respectful.