Honestly, unless you are cutting small pieces of fabric, you just cut. There is no need for starch or anything else. You are simply used to the habit of having that stiffness. Most quilters cut without starching first.
For small pieces, yes, I like to use starch (I'm trying out Mary Ellen's clear non-starch this week).
Yes, I'm one of those who doesn't prewash fabrics. Mostly out of laziness. I just don't feel compelled to do so unless I'm doing a swap or using white as a background fabric.
Note to poster: If I were making products for sale, I would prewash and starch.