Doing ground work and 20 something woman comes in the small arena with a large gelding.She asked if it would bother my horse if she would lunge and ride her horse. My response was go for it, if it doesn't bother me it should not bother my horse. She lunges in very tight side reins with a dressage saddle on,horse's head behind the vertical from the side reins.If that wasn't already enough,then she asked me if I would not canter my horse because she wants to "ride " the horse. Being curious I found out he is a 2 yr old Oldenburg and she is from France. I'm trying to contain my emotions asking if she has a helper. "I'm OK he is OK he let's me sit on him but I can't figure out why he won't let me steer him with the reins. " I'm having visions of jumping on her shaking her and saying things I can't repeat. I mumbled something like gelassenheit and learning to stretch reaching for the bit,letting the horse develop strength subtleness etc before even riding. Oh I want to make sure I can handle him was her stupid answer. Response of me ,if you can handle him on the ground what make you assume you are able to handle him under saddle. She wants him to be her Dressage Horse in a couple of years. I packed up and left in total disgust before I go yelling at her. Thanks for reading I feel better now.