What are the Benefits of a Pre-Sex Enema? Considerations in design and evaluation. However, few studies have explored enema use practices. Additionally, this technique allowed the detection of abnormalities in 14 patients that were not found in the colonoscopy [ R ]. High prevalence of sexually transmitted infections in HIV-infected men during routine outpatient visits in the netherlands. A cleansing enema is used to cleanse bowels and digestive organs.