Is it normal i enjoy the smell of my and my girlfriend's ass?

I've licked my girlfriends anus out before and smelt it, the first time the smell sickened me. She was clean but her diet made her intestines smell, well like shit. The taste was average, a salty skin flavor.

However since then I've enjoyed fingering my own ass, not to hit the prostate, just to get the smell on my finger. I love the smell of ass and shit now, it's an afrodisiac for me.