Women credited a variety of factors for their increase in pleasure, including improved hygiene, a longer period before their partner climaxed, and an increased sex drive from their partner.
I've heard anecdotal evidence to support a wide range of opinions on the topic. Some women say sex is much better when a man is au naturel, while others are turned off by the foreskin. And some women I know don't have an opinion either way. What about you?
Source: Flickr User Brains the head