Korean Study of men circumcised as adults

Two Korean researchers, DaiSik Kim and Myung-Geol Pang, studied 373 sexually active men, of whom 255 were circumcised and 118 were not. They found that circumcision reduced sexual pleasure in most cases and that a significant minority of men reported major injury to their penis, causing bleeding, scarring and chronic pain.

Summarizing their results, the authors write:

There were no significant differences in sexual drive, erection, ejaculation, and ejaculation latency time between circumcised and uncircumcised men. Masturbatory pleasure decreased after circumcision in 48% of the respondents, while 8% reported increased pleasure. Masturbatory difficulty increased after circumcision in 63% of the respondents but was easier in 37%. About 6% answered that their sex lives improved, while 20% reported a worse sex life after circumcision.

Conclusion
There was a decrease in masturbatory pleasure and sexual enjoyment after circumcision, indicating that adult circumcision adversely affects sexual function in many men, possibly because of complications of the surgery and a loss of nerve endings.

DaiSik Kim and Myung-Geol Pang, “The effect of male circumcision on sexuality”, BJU International, Vol. 99 (3), March 2007, pp. 619-22