Steak Space
According to astronauts, space smells quite a bit like seared steak. It has also been described as hot metal. It's a sensation that very few will get to experience in their lifetime, so it likely isn't extremely accurate. Still, every time you enjoy a fancy steak dinner, you could imagine you were one with the stars.
Bug Poop
Shellac is the stuff that gives gooey, chewy candy its texture. You can find it coating the outside of jelly beans and candy corn and it is sometimes called "confectioner's glaze" because of this. However, you might not be aware that this glaze comes from bug poop. Kerria lacca insects are the ones who excrete it, but you're the one who intakes it. Ew...