But, he doesn't do it every time we're exercising. I've almost concluded that he's just making excuses like he does when he itches/rubs his legs (by the way, I've never ridden a horse that itches his legs so deeply.. I almost fall off! It's like he's itching his hind legs!)
Anyways, it's just bugging me. I try holding a crop out to the inside, not touching him, which scares him sometimes to throw his haunches back, sometimes not. I also hold my inside leg very firmly against his side, but I carry it along his haunches.
I think he's just messing with me. But any other ideas? At first I'd tap him on the shoulder (he was just learning the whip) but he doesn't respond to a crop at all. He just doesn't care. I was going to try spurs but he's still young and in training.