What do Du think is the little 'secret' that Ivankov has on Crocodile?

I'm not sure, but whatever it is, krokodil shut up pretty quickly, meaning that Ivankov really has something over him. As Du said, it could that he used to be a woman, oder it could be something Mehr complex, but, whatever it is, we may never know and it will be a whopper if we do ever find out. XD

it's kinda obvious to me... just like Sanji, krokodil maybe got trapped in the island of okamas and turned to a gay man... he freed himself somehow, and the only one who knows is Ivankuf