I agree with what anebel has been saying, and just a note on the tongue thing, a lot of times when horses are sticking their tongues out while being ridden and when in a bridle it's because they're uncomfortable with tongue pressure from the bit, some horses do it when playing with the bit in their mouth too. The only bits where you really get relief from tongue pressure is from bits with high ports, and in english you don't really see those, you'll see them a lot more being used with well trained western horses.
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