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Florence weakens to tropical depression but flooding still a danger Now Playing: Brett Kavanaugh accuser willing to testify Now Playing: Yet, for boys, making out without sex cost them male friends, but not female friends. American Sociological Association, news release, Aug. The data and conclusions of research presented at meetings should be considered preliminary until published in a peer-reviewed journal. Friends describe trying to save man killed in Cape Cod shark attack Now Playing: Border patrol agent accused of killing 4 women in less than 2 weeks Now Playing: Would be brown act and it still inside you can have a baby sister act you. After making out, girls had a 25 percent increase in peer acceptance, while boys had a 29 percent decrease, the findings showed. But boys lost friends for making out and gained friends for having sex, according to the study scheduled for presentation Monday at the annual meeting of the American Sociological Association ASA in Chicago. Florence causes 'historic and unprecedented flooding' Now Playing: Florence flooding impacts travel throughout North Carolina Now Playing: Sally Field shares the truth of her off-screen life in new book Now Playing: Tornado destroys buildings in Virginia Now Playing: Rescuers save 6 dogs locked in cage amid rising NC flood waters Now Playing: However, there is somewhat of a paradox for boys stigmatizing girls who have sex because these boys are punishing girls for behavior that benefits boys both socially and sexually," Kreager said. The investigators found that after having sex, girls had a 45 percent loss in peer acceptance, while boys had an 88 percent increase in acceptance, on average. Massachusetts families return home after series of home explosions Now Playing: North Carolina residents desperate for supplies Now Playing: Young patients ride mini cars to surgery Now Playing: Researchers looked at data from youngsters in 28 rural communities in Iowa and Pennsylvania who were followed from ages 11 to 16, and found that girls lost friends for having sex and gained friends for making out without sex. Botham Jean's character assassination? Trump backs Kavanaugh despite sexual-assault allegation Now Playing: Sign Up for MedicineNet Newsletters! At least 1 person killed after Florence triggers tornadoes in Va. Nonstop rescues underway to help get residents out of flood waters Now Playing:
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