I found this on the web:
[...] a study published in Science last summer (7 June 1996)
has caused AIDS specialists to reconsider. In the study,
oncologist Ruth Ruprecht of the Dana-Farber Cancer Institute
tested whether rhesus monkeys could be infected by the simian
immunodeficiency virus (the monkey version of HIV) through
oral transmission. Researchers placed the virus gently on the
backs of the monkeys' tongues, and six of seven of the animals
became infected. In an especially surprising aspect, the
amount needed for infection was 6,000 times lower than was
needed to infect monkeys with SIV through the rectum.
Researchers at Dana-Farber concluded that unprotected
receptive oral sex should be considered a risk factor. Virus
particles from semen (not saliva) probably pass through the
mouth and throat to the tonsils, where large numbers of the
lymph cells favored by HIV reside, the paper said.
So I wonder if a tonsillectomy somehow helps make one more resistant
to infection through oral sex.
Dear Tonsillectomy Person,
There are many good reasons why we should be glad we aren't monkeys, this is just another one of them. Oral sex between humans is a very low risk way of transmitting HIV (it is not "no risk"). Having your tonsils out won't have a significant impact seeing how low the risk is to begin with, it would be hard to measure such a difference.