Study published in International Journal of Epidemiology, April 2011. doi: 10.1093/ije/dyr104

Background One-third of the world’s men are circumcised, but little is known about possible sexual consequences of male circumcision. In Denmark (∼5% circumcised), we examined associations of male circumcision with a range of sexual measures in both sexes.
  
Results . . . circumcised men reported more partners and were more likely to report frequent orgasm difficulties after adjustment for potential confounding factors, and women with circumcised spouses more often reported incomplete sexual needs fulfilment and frequent sexual function difficulties overall, notably orgasm difficulties and dyspareunia.
  
Conclusions Circumcision was associated with frequent orgasm difficulties in Danish men and with a range of frequent sexual difficulties in women, notably orgasm difficulties, dyspareunia and a sense of incomplete sexual needs fulfilment.

Article in American Journal of Preventive Medicine, Volume 39, Issue 5 , Pages 479-482, November 2010. The authors discuss the "external validity" of the three African randomized control trials that examined circumcision as a preventive measure for HIV infection. The nutshell version of this discussion is that clinical conditions that show promise do not necessarily translate into a real world net benefit.

A study in the Journal of the Israel Medical Association found that a significant percentage of boys had a UTI shortly after their Bris.

Isr Med Assoc J. 2010 May;12(5):262-5 by Toker O, Schwartz S, Segal G, Godovitch N, Schlesinger Y, Raveh D. Department of Pediatrics, Shaare Zedek Medical Center, affiliated with Hadassah-Hebrew University Medical School, Jerusalem, Israel.

Abstract

BACKGROUND: Ritual circumcision in neonates may cause a urinary tract infection within 2 weeks of the procedure.

The Journal of Family Practice, September 2001 · Vol. 50, No. 9

OBJECTIVE: Our objectives were to determine if a 50% dextrose solution would reduce the percentage of circumcision procedure time a neonate spent crying by 50%, compared with water, and whether it would be similar to a dorsal penile nerve block (DPNB).

STUDY DESIGN: This was a randomized placebo-controlled blinded clinical trial.

POPULATION: We included 71 patients who were recruited from the inpatient nursery of a military community hospital over a 5-month period.

Men circumcised as children (and therefore without their consent) often complain about their condition. Non-therapeutic genital cutting has significant physical and psychological consequences and has no proven benefits. Unfortunately, in today's culture, men who complain are consistently treated as having something wrong with them rather than being treated as having had something wrong done to them.