Randall Garrett, But, I Don't Think
“ He saw he was not the only spaceman out on the town; one of the Class Five taverns he passed was filled with boisterous singing, and he could see a crowd of men standing around three crewmen who were leading them in a distinctly off-color ballad. The Guesser smiled a little to himself. Let them have their fun while they were on-planet; their lives weren't exactly bright aboard ship. ”
