I know the internet loves cats so perhaps they might be able to answer my question.
My entire life i'm been very allergic to cats. Itchy skin, watery eyes, rashes, wheezing, sneezing, etc. People who owned cats would sometime trigger my allergies.
I recently moved to a new apartment and this stray cat started showing up at my door, I began feeding it outside and would occasionally pet it without any reaction. As the weather began getting colder I let it in, I've become very attached and now she's a full time resident.
In the beginning I had very slight allergies, but nothing too extreme. Now I have pretty much no allergies at all. I thought I just wasn't allergic to cats anymore, so I been more friendly to other cats, but they all give me an allergic reaction.
That's Riff Raff.