Tonight I was talking with a friend, who mentioned a novel/short story he found in a sf collection he read a long time ago: he gave away the book and now he's looking for the title and I couldn't name it.
The plot should be about a spaceship (assumed to be terran) which was massively pierced as a system to allow gravity aboard: the crew finally comes to Jupiter and lands on the "planet". The Jovians aren't hospitable, used to think themselves as the most perfect creatures in the universe and unwilling to have contacts with other races, and reserve the spaceship crew a bad treatment: poison, bombs, acids and so on, but with no effect on the crew. At the end the Jovians go mad and start thinking they're not that perfect people they thought they were.
The crew comes back to ship, takes off and while flying one of them asks the pilot: "Don't you think we had to tell them we're robots?"
I assume it's an old story, but does someone have any idea aboiut its title and author? I'd like to read it.