Saucy Sketch Sunday #185 (Patreon)

He had a talent for designing punitive furniture, which he embraced with a perverted sort of pleasure. His latest creation was glorious indeed: all oiled leather and smooth curves. As soon as he revealed it to his mistress and saw that approving gleam come into her eye, he knew what was coming next...

After all, who better than the inventor to test his own inventions?