If his fingers were broken, he wouldn't be able to announce his ass-fucking ways and then we wouldn't be dealing with it. In order for us to deal with it, he must have use of his fingers though, I suppose if his fingers were broken, he could always clench a chopstick between his teeth and type with that.
My fiance and I knew each other for a couple years before we started dating. I have been openly bisexual and polyamorous for years so he knew that about me when he asked me out. He admitted his own bi-curiosity early on in our relationship and shared with me his experiences with men from back when he was a teen. He also informed me that he enjoys prostate stimulation. I wholeheartedly accepted this information about him, and was grateful he understood that being vulnerable enough with me to be honest made our intimacy even deeper. If he had withheld this information until after I'd already fallen in with him, I'd feel blindsided and would be upset, possibly even so deeply that our relationship wouldn't survive. Therefore, I'd suggest you face your fear of rejection early enough in a relationship to reveal your true self as as possible. If you get rejected early on, it'll hurt you and her much less than if you get rejected later. And you be less likely to be rejected if you tell early than if you tell later (or if you don't tell at all and get discovered later).