Many years ago, our hero of this piece, a one Mr Velvet, had serious intestinal problems, so went to the hospital. Unfortunately, being dyslexic, he ended up at the local glazers instead (make that confused connection if you will, such was his lack of command of English as his first... or second language).
The Poor Glazer chap was a bit puzzled as what to do, so only doing what he could he gave Mr Velvet a glass tummy so that people could see what the problem was.
Finally, after getting to the hospital, and having replacement glass when the doctors had to break the original piece to fix the problem, he emerged, fit as a glass slipper and raring to go again.
He might be better, but he now can't blame food going missing on the dog, everyone can see what he's doing, and has had to resort to fitting a small pair of curtains over the affected area, which he closes whenever it gets turgid down there.
This is the true story of how our good Gentleman got his name!
EDIT: I'm ignoring you Andy, just, because.