New study reported that women who preferred vaginal sex revealed they were able to reach an orgasm faster with men who had large penises.

The researchers found that those who had achieved vaginal orgasms admitted they enjoyed orgasms more when they were with men who had longer penises. However more than 60 percent of the participants said that they did not think penis length was a major concern.
“Male anxiety about penis size may not reflect internalized, culturally arbitrary masculine stereotypes, but an accurate appreciation that size matters to many women — just as men feel legitimate anxiety when they enter the mating market about their intelligence, personality traits, sense of humor, social status, height, wealth, and other traits known to be favored by women across cultures”, lead researcher Stuart Brody told the Huffington Post.
Source-Medindia