 Since people dating often do not know each other well, there is the risk of violence, including date rape.According to one report, there was a 10% chance of violence between students happening between a boyfriend and girlfriend, sometimes described as "intimate partner violence", over a 12–month period.A 2004 estimate was that 20% of U.S. high school girls aged 14–18 were "hit, slapped, shoved or forced into sexual activity".