Study published in Urology, April 2005, 65(4):773-77. The objective was to evaluate penile sensory thresholds in neonatally circumcised and uncircumcised men. The authors evaluated 125 patients, splitting them into functional and dysfunctional groups based on a questionaire. In the dysfunctional group, circumcised men were significantly younger than the intact men (7 year mean difference). The sample size was small, and when attempting to control for age, hypertension, and diabetes, all t-test significance was lost.
The only spot tested was on the dorsal glans. The researchers failed to test the inner foreskin, which is mucosal tissue with a high concentration of Meissner's corpuscles, which are sensitive to fine touch. Accordingly, the study has limited value because the researchers tested a spot that is not particularly sensitive to fine touch.