AS per the POSTERS HERE...ORAL SEX carries NO RISK.
Some consider it Very Low risk....
it depends on u ... the guy/girl whom u have sex with.Its all about knowing each other before getting to BED !!
As far as chaffing is concerned it wunt matter much... it may pose a risk THEORITICALLY but NEVER A PROVEN CASE EVER !! in the history of HIV/AIDS...in the last 26 Odd Yearss