Elizabeth Frayer and Shawn E Milnes, our New York operagoers, have strayed off the well-beaten Met path to attend an opera about fellatio (we won’t translate that). Oral or choral, they were – like the heroine – sometimes lost for words. They clashed, they tiffed, they differed. They posted divergent opinions. He, for some reason, liked it. She, oh read on here….