Today I figured out a way to make an ad hoc slideshow, which will be very convenient for when I'm fapping with one hand and trying to scroll through the images with the other, er, in many ways.
1. Go to the Finder window where the images you want to scroll through are located.
2. Select the images; they can all be contiguous or in different locations in the same Folder window.
3. With the images selected, press the spacebar.
4. Use the left arrow or right arrow keys to scroll through to see each image in the order they were selected.
You could also set up a screen recording of the "slideshow" using QuickTime Player and convert the screen recording from .MOV to .GIF format.