According to CNN, Brenda Uphopho was walking up the stairs in her office when she suddenly felt someone's hand reach underneath her skirt. It was her boss. "I screamed, and he was shocked at my scream," Uphopho, a festival producer from Lagos, told CNN. "And I was shocked that he was shocked." Speaking out about sexual assault and harassment is widely considered taboo in Nigeria, where one in four girls experience sexual violence before the age of 18. Of those who experienced sexual violence in childhood, only 38% told someone about it -- and as few as 5% sought help,  according to a national survey carried out in 2014 .