I had this problem w my mare when I first got her as a filly. I'd never prior had a horse that just stuck to me like glue, whip in hand and in use, or not. Like your guy, she did not understand the "request" to lunge. Although she was a "skitterish" baby, she was very bonded to me. I wanted to teach her what I wanted of her w/o giving her any reason for undue "upset". I marked a spot for my
feet b/c for some odd reason I would have to move way off of center trying to get her going. By marking a spot for me and staying ontop of it, I ensured this "all over the place" stuff didn't happen - as well as communicated what I wanted (i.e., I am the center...you
move :)). I started her "short" (about 7-8 feet) and worked up to disance. This is pretty "close", but I was trying to teach her what "to do". I had to really, really
concentrate on my body "direction" and "stance" relative to her's -- way more
than w a "normal" horse so that she wouldn't mistake any body language as an invitation to come to me - and she would recognize "keep moving" when she saw it
. A "normal" horse will easily and naturally respond to where you direct your body first time
out the gate..."stick to you" horses may not (at least she didn't, at first). She would often just stand there and look at me when I cracked lounge whip! So I would kind of gently snake the lash a little around her rear fetlocks to get her to moving (I don't like to make contact w a lunge whip - and ordinarily you do not have to, but stick to you horses can make you feel like they just called your bluff...I don't think that is what they are actually doing, however). She quickly "got it". Hope something in that helps.