Is there a tool where I can just select the area of the photo and soften all colours that are in the range of human skin? I want to be able to quickly soften skin on, say, 100 images. When I use Lightroom's skin softening brush, it takes minimum a couple minutes per face, per photo, and if it's a complicated one can take up to 10-15 minutes.

What is a better way to do this with either Lightroom or Photoshop? A youtube tutorial would be very much appreciated.