I don't think it's wierd to not want to do anal, maybe it just doesn't do it for you. I've always been the curious type so I've always tried it with more serious SO's.
My first So and I were virgins so we'd never tried it before. After some time and coaxing, she warmed to the idea.
Ah, I still remember that night
She said it was a little painful but pleasurable 'in a different way'.
My second SO had done it before with her ex and was happy to do it with me, so no probs there.
Now, my third SO was from HK and a little prudish at first with sex let alone anal. But it wasn't too long before she walked over to the dark side. In fact, she wanted it more often than I wanted to give.
Just goes to show that you can't really tell but more of a how willing she is to try sorta thing...
