Curtis said the song, which noted nudity by some of Hollywood's top actresses, demeaned the telecast. MacFarlane has also come in for criticism because some of the nudity he described during the song occurred during rape scenes.
"The 'boob' song, as it will be known in perpetuity, may go down as the highest-rated Oscar number in history, but at what cost?" Curtis wrote in the Huffington Post. "I'm sure public executions would get big ratings too, but is that what the Oscars are truly about? Ratings?"
Curtis noted that she did topless scenes early in her career, but would have preferred not to.
"I am an actress who has bared her breasts in films to satisfy the requirement of the role I was asked to do — lucky to do, for in my case, those films were significant in my career," she wrote. "I didn't like doing it. I didn't ask if I could do them topless. I did what was asked of me for the part I was playing. Mostly asked by men."
Curtis also said she was disappointed that the song had, in her opinion, overshadowed the rest of the ceremony.
"What we will be talking about is Seth's lack of class and a 14-year-old boy's derogatory word for one of the most beautiful, motherly and literally nurturing parts of the female form," she wrote.