Sure, in underdeveloped countries, there are many infections from penile-vaginal sex due to open sores
, STD's, etc. However, once again, the graphic pictures
I described above are concerning developed countries.
So - there you have it, my friend. All air-tight situations in which there infected blood has a direct route into the blood stream. HIV is a rather wimpy virus (in the world of transmitted diseases) which is HARD to transmit.