I'm by no means a psychology expert, but one characteristic of trauma in general, is that it is normal for the victim to recreate it in order to have the feeling of 'being in control', that means taking the 'active part', instead of being 'passive' to the situation, like you were during your abuse. Sigmund Freud came up with this. Look it up, it's called 'repetition compulsion'.

It is very likely you don't actually like anal sex, you only like the fantasy of it, as you're trying to convince yourself you like it, to make your abuse seem less bad.

I mean, by all means, you could technically be bisexual, sure. And you are free to try it, but you will probably not like it. If you were truly bisexual, you would also likely have known you were attracted to both men and women before your abuse. If your "attraction" to men came years after your abuse, it's mostly your brain trying to cope.

But OP please, even if you are bisexual, and you end up enjoying sex with a man, that doesn't not cancel the fact you've been raped.