I use something that is a real staple in the directing world. It's called a dance floor. You lay it down so that it's so smooth you can roll around, and you can put furniture on top of it. It's seamless and you don't see it.
The freedom of thought is a sacred right of every individual man, and diversity will continue to increase with the progress, refinement, and differentiation of the human intellect.
Normal birth to me should not be numb from the waist down and waiting for the doctor to tell you to push. There's a reason we feel it. There's a reason we need to feel it.