Final Fantasy

Just finished Final Fantasy IX and although the ending was sweet I found the final battle a little TOO easy. It seemed to be over so quickly and was a bit of an anti-climax. Then got into a debate with Flickums as to whether 9 or 8 was better. I like 8. She likes 9. I'm right

Questions

Why does bubble bath foam up when you put it in water? Why do the bubbles go away when you use soap? Why does soap foam up when you use it?
I need answers