91.4 +/- 5.2 mm Hg mean +/- SEM, p < 0.003), whereas there was no significant difference in the mean maximum squeeze pressures, compared with controls (177.1 +/- 14.1 mm Hg vs. Resting pressures were significantly lower in subjects engaging in ARI (70.7 +/- 3.2 mm Hg vs. All subjects completed a questionnaire that assessed sexual practices and bowel habits, including fecal incontinence. Manometry also was performed in age-matched male controls. Subjects underwent evaluation of resting and maximum squeeze anal canal pressures (maximum squeeze pressure obtained over resting pressure) by station pull-through technique, using a manometric perfusion catheter followed by endoanal ultrasonography to evaluate the structure of the IAS and EAS. We studied 14 anoreceptive homosexual males and 10 age-matched non-anoreceptive heterosexual males in a controlled, prospective cohort study. To evaluate the structure and function of the internal (IAS) and external (EAS) anal sphincters in anoreceptive homosexual men and to determine whether anoreceptive intercourse (ARI) is associated with a higher risk of incontinence in this population.
