i think that HIV lasts for about half a minute, while hepatitis lasts for a couple of hours at least

basically, if he shoots outside any kind of mucous membrane (your anus), it doesn't matter, there's literally no change of getting infected so long as you don't do anything with the sperm afterward

it's present in precum because precum = ejaculate minus sperm cells

but, in such low concentrations that it's nearly impossible to contract it that way (and i doubt ANYONE EVER has)

long story short, NO.
with HIV, any kind of penetration is out of the question.

long version, viral load means "in blood" not "in semen/urine"
the genital system is one of the "sanctuary places" where the immune system doesn't work (otherwise it would make reproduction impossible)
that's why people contract HIV by sex but not by coughing on one another or kissing one another.