There are many such people. My former two college classmates were eight-shaped. During military training, they walked straight and then stepped down, and were criticized by the staff in public: Are you ducks? Go out and run ten times to the ninth floor! Is this their business? Do they want military training? Is the innate habit a sin? But they will be punished because their posture does not meet the requirements of military training. That is the reality. Later, they only participated in military training and did not participate in marching performances. This is different.
Everyone has weaknesses and defects, but we must face them and try to avoid and improve them in the future, that is, we should pay attention to what we are doing now and try to avoid them in the future. In terms of improvement, you can try playing football, because playing football can make your feet flexible, hoping to help you change the habit of splayed feet.
Students laugh because they only see your weaknesses. If you can show your strengths, they won't dare to laugh.