Refugees from Sudan took part in a class dealing with violence against women, at a refugee center in Lunde, Norway.Credit...Andrew Testa for The New York Times SANDNES, Norway — When he first arrived in Europe, Abdu Osman Kelifa, a Muslim asylum seeker from the Horn of Africa, was shocked to see women in skimpy clothes drinking alcohol and kissing in public. Back home, he said, only prostitutes do