Riding a horse without saddle causes you to become stuck.

I was taming several horses in creative mode to try them out. After taming a horse, I tried to ride it without equipping a saddle.

What I expected to happen was: I would not be a able to get on OR I would be able to get on but also off

What really happened was: I was unable to move, get off, or perform any action.

Sorry, I do not know how to take screenshots.