Is it normal that I really want to lick a girls butthole?

I had a girl bend over and spread her butt when I was 13 and she was15 but I didn't lick it I smelled her butthole, we were at my house she was a neighbor and we dared eachother things and I dared her to do that and she pulled down her pants and panties below her butt ( not of) and I as her naked butt and she bent over and grabbed her buttcheeks and spread them open and her buttcrack opened and I saw her butthole and I put my nose in it and smelled it for a long time, and her buttcrack and butthole smelled very sweaty and musky I loved it and I had the smell of ass on my face for the whole day and night she said she likes her butt to be smelly because sometimes she touches and scratches it and smelled her fingers and she say she's she gets turned on by smelling her butt.