Waldinger et al. recruited 500 men (98 circumcised and 261 not-circumcised) from five countries: the Netherlands, United Kingdom, Spain, Turkey, and the United States and studied their ejaculation times during sexual intercourse. They found that circumcised men took on average 6.7 minutes to ejaculate, compared with 6.0 minutes for uncircumcised men. This difference was not statistically significant. The comparison excluded Turkey, which was significantly different from the other countries studied.[28] Commenting on the study, Sorrells et al. said “Turkish men, the vast majority of whom are circumcised, had the shortest Intravaginal ejaculation latency time (IELT).”[4]
Collins et al. conducted a prospective study of 15 adult circumcision patients, using the Brief Male Sexual Function Inventory (BMSFI). The authors did not find a statistically significant effect on ejaculation scores.[23]
In a study of 42 Turkish men circumcised for religious reasons, Senkul et al. did not find a statistically significant difference in BMSFI ejaculation scores, but found a significant increase in the mean time to ejaculate. The authors suggested that delayed ejaculation may be seen as a benefit.[22]
In a telephone survey of 10,173 Australian men, 22% of uncircumcised men and 26% of circumcised men reported reaching orgasm too quickly for at least one month in the previous year. The difference was not statistically significant.[21]
Kigozi et al. reported that, in a randomised controlled trial of 4,456 men of whom 2,474 were selected to be circumcised, the authors did not find a statistically significant effect on premature ejaculation.[24]
Krieger et al. reported on a randomised controlled trial of 2,784 participants, of whom 1,391 were randomised to be circumcised. 54.5% of circumcised men described their ease of reaching orgasm as “much more” at 24 months after randomisation.[25]
In a study of 255 circumcised men and 118 uncircumcised men, Kim and Pang reported no statistically significant difference in ejaculation or ejaculation latency time between circumcised and uncircumcised participants.[26]
In a study of 150 men circumcised for benign disease, Masood et al. reported that 13% reported improvement in premature ejaculation after circumcision, 33% reported that premature ejaculation became worse, and 53% reported no change.[1]