In 1961, Harry Truman was shown one of the Mercury Program capsules."How in the hell do these guys take a leak?" he asked the assembled NASA dignitaries. "There was a lot of foot shuffling," Alan Shepard recalled. "Then someone finally responded, 'Uh, sir, they don't.' Truman walked away convinced that the country's space engineers were loonies."
[Early flights were so short (as little as 15 minutes) that astronauts were usually able to wait until they had returned to Earth.]