this guy is a complete quack
here's a quote from a "heterosexuals don't have to worry about HIV" topic:
"If you're looking for a sexual lubricant that kills HIV and potentially other STDs, I discuss a much better alternative in my book".
this guy is selling (by way of his book) a form of snake oil to lull people into complacency about the risk of std transmission.
very scary that anyone with a medical degree would do such a thing!