Someone said :
Always used a condom when having penetrative sex (when not in rship)....not always with oral sex....I think the transmission rate for Hiv is very low/tiny that way?
The level of virus present in pre-cum is as toxic as cum so the old 'I don't swallow' thing is negated. Pre-cum is present almost from the time a guy gets erect.
This also goes for rectal fluids for all you tops who think by virtue of being a top you're out of danger, in fact, recent stats show that sometimes rectal fluid in a hiv poz bottom is more toxic than cum]....
So, it doesn't really matter how the virus gets into the blood stream, does it?
Any of the scenarios I drew in the OP can let it into your blood such as cavities, cuts in the mouth etc.