I have a question. Why is the "soap" itself important to the routine if the material it's made of is not?
It's because it's a little gag routine using a bar of soap as a "dove". get it "dove" soap? So the soap is being used as a physical pun and not being used for it's (scientific) properties.
DrewPS. Please nobody copy.
You have my word, that idea doesn't appeal to me at all. I was thinking that the soaps properties were somehow important and I was thinking you quite clever for exploiting them. I was wrong