of risk and disease severity). Many factors can influence an individual’s decision whether or not to engage in risky sexual practices. For example, some men believe that risks vary as a function of factors such as partner characteristics (e.g., long term, monogamous seronegative partner), biology (e.g., viral load of the infected person), sexual practices (e.g., withdrawal, insertive or receptive UAI), and antiHIV measures (e.g., spermicides, condoms) (Suarez and Kauth, in press).