

A shape can not be copywrited. Copyright is for written, filmed, or musical work, as well at its derivatives.
Shapes can be trademarked, but an oval is not trademarkable because it is a very generic shape.
Why isn’t more soap oval? Economics. It’s far more expensive to mold mass-market soap in round shapes. It’s dramatically cheaper to make it square.
Dove is marketed as a luxury product, so they can charge more and recover the extra cost of production.
Language is sus