Lilliana on Texas and her boyfriend on Cody. Cody, the red one, is kind of a tiny horse for a man like that. Even I would think twice before getting on him (well, I am taller than the rider so that's fair)
I suggested him to ride without stirrups as it allows to relax more for him and for the horse as well. I feel like I am forcing my students to ride without stirrups more and more. I am riding mostly without stirrups myself, because it looks, feels more natural, so to say. You let your legs swing on the sides of the horse's body and hug it gently and you have no support other than your thigh strength and your lower back flexibility. If you don't know how to adjust your body to the movements of the animal you're riding, you're going to fall off. In my philosophy, if you don`t know how to move with the horse, you should not ride a horse. You either feel it or not.