Infective Hallucination in "Martian Chronicles"

The psychologist shut his eyes and scratched his nose. “This is the most incredible example of sensual hallucination and hypnotic suggestion I’ve ever encountered. I went through your «rocket,» as you call it.” He tapped the hull. “I hear it. Auditory fantasy.” He drew a breath. “I smell it. Olfactory hallucination, induced by sensual telepathy.” He kissed the ship. “I taste it. Labial fantasy!”

He shook the captain’s hand. “May I congratulate you? You are a psychotic genius! You have done a most complete job! The task of projecting your psychotic image life into the mind of another via telepathy and keeping the hallucinations from becoming sensually weaker is almost impossible. Those people in the House usually concentrate on visuals or, at the most, visuals and auditory fantasies combined. You have balanced the whole conglomeration! Your insanity is beautifully complete!”

An alien psychologist on a planet of telepaths believes visitors from Earth are insane and their insanity is contagious.