It does to some extent. When the bubbles rise, the spoon will cut the large pack of bubbles in two, making the center collapse, so there are now two packs of bubbles on each side thanmt can't go as high because the shape (a half circle instead of a full circle) makes the building of bubbles less stable.
You don't need a spoon or it to be wooden though (although the material may have a small influence).
This doesn't work. I've tried it several times. There's no difference between having a wooden spoon on tge pot or a metal spatula. It just doesn't work.
Not sure. This trick works with some older spoons of mine and doesn't with the new ones. Don't know why... Thought they were putting something on the new ones🤷♂️