Why i get turned on by 26-46yrold menwith hairy chest and ball bellies?

Hi,i'm an asexual male,and i always wondered why i get turned on when i see 26-46 years old men with a hairy chets and a ball beer belly,it's weirs because it's the only thing in the world that turns me on...since i was a kid,i get turned on by it and i feel like a degenerate...i knew that it was a site for this thing,but they were attracted to obese squishy guys with big boobs and that's disgusting imo,but i want to know why i get aroused by men hairy beer bellies if i'm asexual? when i was a kid i sleept with my uncle that it had like 39 yearls old at the time,he got shirtless and it has a round belly with an open navel without disgusting man boobs and it was hairy (he its handsome too) and i get an erection when i saw him shirtless and i think i fapped...i want to know why this happens to me...i'm a failure? someone has this problem? can anyone help me or explain me why this happens to me?