Sounds like bullshit to me.
Oh look it’s on snopes…
Russell Schweickart, the Lunar Module Pilot on the 1969 Apollo 9 mission, said in an interview urinating in space was a little tricky:
There’s always the possibility that in maneuvering around in a suit you can end up pulling off the condom, and there’s always — we have three sizes you know, small, medium and large — in diameter, and there’s always this little ego thing about which one you do pick. Of course the smart guy picks the right size, because it’s very important. But what happens is, if you get too small a size it effectively pinches off the flow and you just turn yellow because you can’t go; and if, on the other hand you’ve got an ego problem and you decide on a large when you should have a medium, what happens is you take your first leak and you end up with half of the urine outside the bag on you. And that’s the last time you make that mistake. So it’s a cute little trick there.
You’d think a book editor would check, maybe.
Also of course I think it’s unlikely an astronaut actually flew without trying this this on first, and I so far see no evidence of a complaint about this, just that there were sizes and that it was important to chose the correct one.
