Horses always follow a leader in the pasture. However, if you don't want to be the leader in your relationship with your horse, your horse will gladly step up to the plate. If you want to get that leadership back, most horses are willing to give it up. However, if your horse has been the leader for a long time, he might be reluctant, but not impossible. Every time you let your horse take control, you are teaching your horse this is acceptable .
Horses learn through repetition.
You don't have to teach your horse to do anything. You just have to allow them to do it, and you are really teaching them. You are teaching him that he is allowed to walk off when you are mounting him. You are teaching your horse that it is acceptable for him to pin his ears back at you. It is very important that you understand that horses don't understand English.