Some of the findings from this article by US News and World Report:
"While nearly three-quarters of boys surveyed reported having ever masturbated, that figure was slightly less than half among girls. For both sexes, the likelihood of engaging in masturbation appeared to increase with age. Among boys between the ages of 14 and 17 the percentage of those who had masturbated at least once rose from about 63 to 80 percent. Among girls, those figures were lower but still followed an upward slope, rising from about 43 percent to 58 percent across the same time-frame..."
"Boys also engaged in masturbation more frequently than girls: about half of the boys said they engaged in the activity at least twice a week, but that figure fell to about 23 percent among girls. An estimated 46 percent of girls reported masturbating only a few times per year."
The facilitators of the study also remind parents and teens that masturbation is a normal behavior. They would like this information to be a part of a teen's sexual education classes. For parents I think we need to remember to give our teen boys and girls privacy, knock on the bedroom door when it is closed, etc. Also, teach our teens how to clean their own sheets.
My thoughts on why boys masturbate more than girls? ...besides testosterone? We bring up our girls to have more sexual inhibitions which include body image issues(air brushing pictures of size 2 models) and lower self-esteem. Thus, less masturbation? Maybe. What are your thoughts on the study?