A new national survey in Denmark, where about 5% of men are circumcised, examined associations of circumcision with a range of sexual measures in both sexes. Circumcised men were more likely to report frequent orgasm difficulties, and women with circumcised spouses more often reported incomplete sexual needs fulfillment and frequent sexual function difficulties overall, notably orgasm difficulties, and painful sexual intercourse.
https://www.ncbi.nlm.nih.gov/pubmed/21672947