However, with a dry suit it is similar to a spacesuit. It is a pain to de-suit just to go for a pee (some of the old-timers have zips that allow them to pee above water, but it isn't very common.. and I prefer to pee underwater).
Many people use pee-valves which work in a similar way to the twitter thread. External catheters which are like condoms with glue inside, and a tube which allows the liquid to escape outside the suit.
Trouble is, I didn't know my "size". The medical company that makes them will post a selection of each type and a "sizing chart". The chart is a cardboard disc with cutouts that you can use to measure up against your body. For the same reasons as the thread, they use measuring in millimeters rather than t-shirt sizes.
A few days later, I was on a road trip with my daughter and the company called to see if I received the pack and was able to place a real order. I answered on hands-free and I was asked, "What size will you need sir?". How could I possibly answer that sat next to my daughter? :o
For female divers, the main option is a pad and glue. Sounds awful.