KUALA LUMPUR, Malaysia — Singapore announced Sunday it will decriminalize sex between men by repealing a colonial-era law while protecting the city-state’s traditional norms and its definition of marriage. During his speech at the annual National Day Rally, Prime Minister Lee Hsien Loong said he believed it is the “right thing to do now” as most Singaporeans will now accept it. “Private sexual behavior between consenting adults does not raise any law and order issue. There is no justification to prosecute people for it nor to make it a crime,” Lee said. “This will bring the law into line with current social mores and I hope provide some relief to gay Singaporeans.”