"People do not know how bad it is," Sandra Borch, who heads the Centre Party's youth wing told NRK. "I get sent pictures of naked men or nasty messages almost every day, especially on Facebook. I have simply lost count of how many such messages I have received."
Mari Braaten, the former head of the Labour Party's youth wing in Oslo, last week received several photographs of a man's erect penis on Snapchat, a photo sharing service.
"As it sank in I was more and more pissed off," she said. "I thought that I not be silent about what this boy had done. Men can not be allowed to think that this is okay."
She decided to tweet in protest to try and out the perpetrator.
DU som kaller deg "Krsund". Slutt å send meg snapchat-bilder av din erigerte penis. Jeg trenger det ikke!— Mari Siljebraaten (@Msiljebraaten) September 20, 2013
Borch said that fear of facing this kind of harassment had pushed her to be less prominent publicly, and warned that other women might decide to avoid a political career.
"I was just looking at my colleagues in the Centre youth party. There are several girls who are reluctant to take important roles, precisely because of this."