After a long rehearsal and a lot of planning, actors know how to substitute themselves for the characters (mostly without creating problems for the actors themselves). They can be “clear about drawing distinctions between performance and life. Ms. Grant believes in ‘really healthy, strong boundaries,’ she said, and as Mr. Hernandez put it,’This is literally my job. I went to school for it. I’m not skeezing on anybody. It is in the text.’ No carnal appetite here.”