Diana’s lip
Is not more smooth and rubious. Thy small pipe
Is as the maiden’s organ, shrill and sound,
And all is semblative a woman’s part.

– William Shakespeare

Twelfth Night, Act 1, Scene 4. When Orsino first meets Viola who is posing as the pageboy Cesario, he notes that “he” is rather feminine in appearance. So maybe Viola’s disguise is not as good as she thought it was. Orsino goes on, in a rather sensual and suggestive way, to describe Cesario’s physical attributes, like “his” lucious red lips and high pitched voice. Orsino appears to be actually attracted to Cesario. At this point Cesario is about to set off in a bid to woo Olivia on behalf of Orsino, who seeks to think Cesario is perfect for the job.