The video is delightfully instructive ...
No, actually male astronauts have an "appliance" that is a high-tech equivalent of a mayonnaise jar, as well as a diaper.
Ah, well ... I came up with a neater, more efficient, and more invasive solution for my space opera.
But they can only do that for times when they can move about... during manual flight and launch, or things like space walks, they're stuck.