On the other hand, there are many good reasons to skip underwear.
The roast beef?
I coughed up soda when I read this.
This would happen to me all the time when I was about 5 years old. I would go to the rest room in the middle of the night. I had those full body, zip up pajamas. I would just stand there and cry until my mom came and fixed it. You could try that approach if your mom is near by.
That, plus a slip prevents people seeing through your skirt if the light is angled just so. And prevents people seeing the outline of your underwear if you’re sweating. Slips are very very useful. Use them!
The only skirts I ever wear are lined, which makes a slip a bit redundant, but I guess those usually have zippers that are too fine to pinch much either. I am now warned if I ever break out a casual skirt.