In Kirstowsky v. Superior Court (1956) 143 Cal.App.2d 745, the court quoted with approval from Annotation 156 A.L.R. at page 289: "'A criminal trial judge, in the exercise of a sound discretion, may exclude members of the public as it may become reasonably necessary in order to protect a witness or party from embarrassment by reason of having to testify to delicate or revolting facts, as a child, or where it is demonstrated that the one testifying cannot, without being freed from such embarrassment, testify to facts material to the case.'"