MrXxx is a martian psychiatrist from The Martian Chronicles by Ray Bradbury. The earth crew who is greeted by him however, thinks he is part of a welcoming committee. When they tell him where they are from, they think he's taking them to some kind of Marian greeting ceremony.
At the end of the chapter, they discover they've been locked away in an asylum. Third (?) mission to mars that disappears never to be heard from again.
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I'm not likely to be around much longer. As before when I first signed up here years ago, I'm finding that after a long hiatus, and after only a few days back on here, I'm spending way too much time here again already. So I'm requesting my account be locked, banned or whatever. It's just time. Until then, well, I dunno...