“Doctor, I’m here because I’m a . . . I’m a . . . “

“Relax. Many people have psychological conflicts. Lay back on the couch and tell me about it.”

“Okay. It’s just that I don’t know if it’s normal or something I should worry about. I’m a . . . vegan.”

“I see. It’s not an uncommon condition among the upwardly mobile. Something like three percent are afflicted at one time or another. The scientific...