PURPOSE: To evaluate the long-term results of adult circumcisions performed by plastic clamp technique as well as the effects on sexual function. MATERIALS AND METHODS: A total of 186 adult males with the mean age of 21.2 ± 2.8 years who presented to our clinic for circumcision between February 2007 and January 2010 were included in the study. Safety and acceptability of circumcision with plastic clamp technique as well as its effects on sexual functions were analyzed with a mean follow-up period of 30.4 ± 14.2 months (range, 12 to 52 months). RESULTS: The mean duration of circumcision and removal of the clamp were 3.1 ± 1.1 minutes and 16 ± 7 seconds, respectively. The total complication rate was 2.15%. Wound dehiscence (1.07%), infection (0.54%), and bleeding (0.54%) were the encountered complications. Complete wound healing was observed at a mean of 25.5 ± 4.6 days. We did not encounter any penile deformity or other long-term complications. Circumcision did not adversely affect the sexual drive or ejaculation based on the brief male sexual function inventory scores. Erectile function and overall satisfaction improved following circumcision. CONCLUSION: Circumcision performed by plastic clamp technique in adult males had a low early complication rate with no long-term complications and caused improvement in some of the sexual functions. We suggest the utilization of this technique as an easy and a safe way of circumcising adult males.