I think they come from Africa and Europe
A gusset is a triangular or square piece of fabric inserted into a seam to add breadth or reduce stress from tight-fitting clothing.
Explanation:
the main finishing materials in modern construction include finishing mortars and concretes; natural and artificial masonry materials and items made from wood, glass, plastic, and metals in paints and varnishes
Write in one of the various standard rhyme schemes (Shakespearean, Petrarchan, or Spenserian). Format the sonnet using 3 quatrains followed by 1 couplet. Compose your sonnet as an argument that builds up as it moves from one metaphor to the next. Ensure your poem is exactly 14 lines.