@Ploshkin are you about to become one of those with colour co-ordinated undies?
I worked with a gorgeous young woman who apparently always wore matching bras & undies. A friend who was ages with myself looked at me askance when I said that I also wore matching bra & undie sets.When I explained they were all grey & raggedy she agreed, she had sets exactly like that too.
I do have leftover fabric put aside for new undies, it's in with all the other leftover fabrics put aside for, I dunno, sumfimk.