Can someone explain this to me?

girls with hairy arms, fetish. I never heard of it before, than today (out of the blue) my friend revealed he has like a weird fetish for girls with hairy arms.

I get that a lot of fetish's are weird but whats so appealing about this one
?

I just don't get it....

It's a fetish, unless it's your fetish you won't understand it. There's a fetish out there for practically anything.