You're not paranoid, as far as I know it's indeed possible to get HIV from unprotected oral. It being less risky than anal doesn't mean a lot when anal is the absolute riskiest sexual practice in terms of HIV infection. Plus there are other STDs that you might want to avoid carrying in your mouth
I thought there was a risk if your mouth is bleeding (because of a cut or something like that).
Are we supposed to always give oral with a condom on? Well actually I know that we are supposed to but I nobody I know ever used one for that.
Man, sex is so dangerous, haha.