Something about being allergic to cats makes cats really, really like you for some reason. No bullshit, literally 10-15 minutes ago I was carrying groceries inside and a neighborhood cat randomly walked right up to my front step and started rubbing itself on me while my dogs barked like mad out the glass door.
and yes I sat down and pet the cat for a bit. I dunno how true this is for other people with cat allergies, but I only really have trouble with them in enclosed spaces, homes with indoor cats just suuuuuck to breathe in.