Kiwi, fear not for you are not alone
I'd always known I had an attraction for cock, but went through the motions and got involved with a girl, then another one, finally one more. That's about 7 years of trying to make relationships with girls work. During that whole time I had one gay encounter (oral only) between 2 het relationships, I just didn't want to cheat on my then gf's. During those 7 years I'd read and watch gay porn, was intrigued by the anal, but never ever saw myself doing it. That's an exit not an entrance right? And it's dirty to boot! After I said goodbye to straight relationships and played around with guys some, I eventually found myself in my first gay relationship.
First thing I figured out was I'm a hell of alot better gay boyfriend than I am a straight boyfriend

Next thing I found was, I'm in love with this guy, and I really wanna have sex with him, 'real' sex, go ALL the way, that sort of thing. Seven years of regular intercourse is hard to give up! Without making a long story too much longer, that ended up being the wedge that eventually ended my first gay relationship. I hadn't had intercourse in the 3 years we were together, he'd never been with a girl, never been involved with any sort of penetrative sex, and was very happy for us to continue slurping on each others rods for the forseeable future.
Cut to my next relationship, he's had experience with anal, also been with girls. He'd been a bottom mostly in previous relationships and I'd been dieing to top a guy. It was flat out amazing! Anal sex with a guy was everything I'd never allowed myself to think it could be LOL. Plus, he get OFF on it so much. I did my reading up on prostates before we did it together the first time, had my lay of the land so to speak, and I made sure I hammered that button with my cock. I wasn't prepared for just how much pleasure he got out of it, so it wasn't long before fingers, dills and more were being thrust into my own bum. Now I'm still versatile, but one of the biggest power bottoms you're ever likely to meet! The thrill of my first anal orgasm got me started down a road I am happy to never see the end of, the journey is just too much fun!
So ya, long story longer, it was intercourse withdrawal which got me over the first bits of anal taboo programming we all went through growing up, and first hand witnessing of just how much pleasure is waiting for us there that got me to try it myself. So from completely against anal to power bottom in less than 5 years, hurrah! That's my story in a nutshell. I don't find anal disgusting at all anymore, I've educated myself on the ins and outs.
My development is my own however, and there's no saying you ever have to like or even try anal and I've met several couples who just don't do anal together and are very happy. Read this part carefully:
There are no rules for how a relationship between two people should be conducted, you're free to make your own. It's healthy and normal so long as everyone's happy and noone's being hurt.
Cheers,
Hairyguy