The zero to low risks of HIV transmission by oral sex have been repeatedly discussed on this forum, including a number of questions in just the past 2-3 days. Search the threads for "HIV transmission risk" and "oral sex". There also have been discussions of circumcision status; search for "circumcision".
I have many times given the same annual testing recommendation as CDC, for sexually active persons outside committed monogamous relationships. More frequent testing is recommended for people at particularly high risk, such as gay men with multiple partners.
HHH, MD