Why did astronauts' space suits leak urine?

Ariel Waldman, creator of Spacehack, has just published a delightful book titled "What's It Like in Space? Stories from Astronauts Who'Ve Been There?" Illustrated by Brian Standeford, it's a fun collection of astronaut anecdotes on everything from sneezing and farting in zero gravity to weird frights and the necessity of Sriracha in space. Here's an excerpt:

The early male astronauts often had leaky space suits. They would frequently complain about their urine leaking into other areas of the suit. For a while, no one could figure out what was wrong with the spacesuits. NASA eventually realized the leaking was due to the oversized condom catheters the astronauts were using. Turns out that when the astronauts were asked by doctors what size they needed, they would often ask for "large."

Buy "What's It Like in Space? Stories from Astronauts Who'Ve Been There?" (Amazon)

Excerpted from What's It Like in Space by Ariel Waldman, illustrations by Brian Standeford (Chronicle Books, 2016).