I tried bananas with Aristotle when I first brought him home (About 9 weeks OOP) and he wanted nothing to do with them. Not even with a little peanut butter dabbed on a couple of the pieces.
*However*... I tried them again recently and sliced some up for each of the boys (Ari who is now almost 19 weeks OOP, and Zeus who is just over 9 weeks OOP now) and an interesting thing happened...
Ari ate ALL of his, yet Zeus wouldn't touch ANY of his.
Now, the biggest difference I can think of is that Ari was with me as I prepared their dishes that night, so he actually got a piece before I served it. (He normally hangs out in my shirt while I make their food, and likes taste testing everything before I put it in.) So... maybe hand feeding him a piece as a treat is what provoked interest, where there was none before?? Or maybe it is an age thing... I'm not sure.
Since then I have actually taken to freezing the bananas before serving them. WAY less mess btw... and he seems to love them now. I'm going to try hand feeding Zeus some later and see if he will eat them if they are introduced as a 'treat' to him first too. I'll let you know what happens there, as that may be a possible solution. :)