Over my many years of collecting Superman comics, I've certainly read my fair share of Metropolis Mailbag letters pages. Through all those decades of Mailbags, young fans asked the burning questions like "How do you pronounce 'Mxyzptlk'?" or "Where does he put his Clark Kent clothes when he's Superman?", while the mysterious "editor" patiently answered them over and over again.
However, there were times when those old Mailbags genuinely surprised me, when a question or an answer would suddenly veer off into uncharted weirdness. One such letter was printed in Superman #143 (1961), as one Tony Armalis from Chicago asked a question regarding the marital status of Superman and Lois Lane....followed by an answer from the editor that bumped the normally G-rated spirit of the letters page into the neon-lit world of...
First, a quick confirmation courtesy of
Webster's dictionary... (click to enlarge)
...and there you have it. Editor Mort Weisinger invalidating the Lois/X-Plam and Superman/Jena the Space Girl marriages on the grounds that they didn't go all the way!