While this might seem like a weird question, it has been on my mind for quite a while now. When looking at old drawings of the mongol horsemen, they all appear to be wearing some sort of tunic or other dress-like apparel. Wouldn't this hurt the finer parts of the rider? How does this compare to other horse-based civilizations? Is it common to not wear pants while riding a horse? Did the turks wear pants? The huns? Well, thanks in advance, to anyone answering my weird question.
Assuming you mean trousers, and not underwear the answer is generally yes, but it's also geographically determined since the Mongols tended to adopt the clothing of the people they conquered. Therefore, it's rather hard to see the trousers under the robes worn by Mongols in China but they are visible on these grooms here.