Is your fixation with rats sexual in nature?
They'd have to be a highly intelligent rat.
As a young person in my early twenties I can say, although intelligence makes me romantically interested in a person it does not make me sexuality interested in a person, just more tolerant to have sex with them out of love. Although I only have sex with people I'm married to to respect my husband. Although I am apathetic towards sex.
No I do not think of rats in a sexual light. It is a rat. If it is not my husband I'm not intimate with it.
I don't think there needs to be a lable for being romantically attracted to a certain type of person and although I could go from saying I am sapiosexual to sapioromatic, it really just seems pointless and stupid.
To be honest I would guess that a big part of my asexuality is my Autism which makes it difficult for me to take to much physical touch from people and sex requires a lot of physical contact