Are bits painful for horses?

Excuse me, but I couldn't help but notice the question about bits and horses. Could you elaborate on why you're asking if bits cause pain for horses? Are you concerned about the welfare of horses and how they're treated in the equine industry? Bits are commonly used in horse riding to control the horse's movement, but they can cause discomfort or even pain if not used properly. I'm curious to hear more about your thoughts on this topic and whether you have any specific concerns or questions regarding bits and horse welfare.