About half of American adults indicate using a vibrator, according to a new survey that sheds light on acts that take place beneath the covers and behind closed doors.
Women who used vibrators also reported better sex, including higher sexual desire and arousal, as well as orgasm. However, there was no significant difference in general sexual satisfaction between female vibrator users and non-users.
More than 50 percent of women participants had used a vibrator, with nearly one in four having done so in the past month.
More than 70 percent of women reported having never experienced any side effects associated with vibrator use. (Those side effects that were reported were typically rare and of a short duration, including mild genital numbness, irritation, or inflammation.)
About 45 percent of men, both gay and heterosexual, reported incorporating a vibrator into sexual activities. 
clipped from: www.livescience.com