Effects of BufferGel and PRO 2000/5 Gel in Men

Inclusion Criteria Patients may be eligible for this study if they: * Are male and at least 18 years old. * Are HIV-positive. * Have a CD4 cell count over 200 within the year before study entry. * Can speak and write English. * Can provide address, phone number, or other contact information. * Agree not to apply other products to the penis during the 3 weeks of product use. * Agree not to have sex, masturbate, or perform other activities that may irritate the penis during the 3 weeks of product use. Exclusion Criteria Patients will not be eligible for this study if they: * Are allergic to any ingredients in the study products. * Have had inflammation of the urethra (painful urination, burning, or itching) in the past. * Have had penis skin reactions, eczema, psoriasis, severe seborrheic dermatitis, or other similar problems in the past. * Have had a non-HIV sexually transmitted disease (STD), including a genital herpes outbreak, in the past 6 months. * Have had a change in anti-HIV drugs in the past 30 days. * Have taken part in any other study of an investigational product in the past 30 days. * Have broken skin on the penis. * Have signs or symptoms of an STD. * Apply topical products (e.g., creams or ointments) to the penis. * Have an abnormal finding on the physical or genital exam. * Have a positive result from a urine leukocyte esterase (LE) test. * Use any drugs that would affect the study, in the doctor's opinion.