Your friend has nothing to worry about and does not need to be testing. His exposure is a combination of two types of exposures which have never been associated with HIV transmission. Never twice is still never.
HIV is not transmitted through clothing, even wet clothing. The virus is exposure to the environment in the case of wet clothing and dies very quickly in the environment. Furthermore, your friend's thought that he might be at increased risk because of cracked lips is also faulty thinking. The quoted figure for HIV risk, if one has oral sex with an infected partner is less than 1 in 10,000 and, in my estimation that is too high. Some experts state there is no risk at all from oral sex. Neither of us on this site have ever seen or reading the medical literature of a convincing instance in which HIV was passed by oral sex. This includes by all of the people who had cracked lips, gum disease, etc.
Bottom line, the exposure you describe is no risk for HIV. Take care EWH
Is it still a zero risk situation considering that in this particular incident there was no saliva involved--therefore no "enzymatic" properties to fight off a virus? There was direct contact with a wound. Sorry for doing this to you!