Is it normal that i have a fetish for tight jeans

I would be able to make you happy with my tight jeans, and smelly butt. My butt does not smell like poop, it smells like a sweaty dirty musky butt. Sometimes my butt smell turns me on and I rub my pussy while smelling my fingers after scratching my butt and it is so hot. I love looking at my butt in the mirror I take my pants and pantie under my butt and I look at my naked butt and it turns me on because I know it stinks. I like showing my butt in jeans or shorts especially shorts because I show my legs. I remember about 5 years ago I wash wearring shorts and my legs were folded and my younger 10 year old step brother was looking at my legs and butt and he said that every time he saw my legs and in shorts and butt that the smell of ass came to his mind and it made his dick hard. I told him to find out and he sniffed my butt and he I pulled my shorts and pantie down and I lay on my side with my legs folded and he was looking at my naked butt and I grabbed my left buttcheek and spread it open and I let him see my butthole and he sniffed it and he said " oh my god your bootyhole stinks" but he liked it