Fembot — a series by Hungry Guy
Part of the Women As Sex Toys universe

He wandered through the showroom of fembots. He stopped at one and asked, "How are you so realistic?" She answered, "My skin is a protein-based polymer that has the feel and taste of live human flesh. It's porous internally, and warm oil is pumped through it to make it feel like human flesh. I'm indistinguishable from a meat girl by sight or touch. My mouth has artificial glands that produce real saliva, and my vagina has artificial glands that produce real feminine lubricants that are chemically identical to those produced by a meat girl."