hypnotist:
You are not his boss but you want to tell him what to do. He should dress to please you. After all , you are only doing it for “his own good”. Leave the guy alone.
Let him dress as he pleases. Learn from it. You need to learn from his manner of dress, he doesn’t need to learn from you.
Suck it up Grow.
Remembering a recent class taught by our Bishop, I would point out that our priests, our bishops and even the Holy Father see themselves as servants to all.
That cetainly does not mean that we should be attempting to “boss” them around; telling them how to dress, etc. But it does imply that they have an obligation to present themselves in a manner that denotes respect for the holy office that is a priest.
Priests also vow obedience to the majesterium and more directly to their Bishop. That includes dressing accordingly in public. They do not dress to please us or themselves, but to be obedient.
Our Bishop asks our priests to be accountable both to him in obedience and to parishioners in humility. He also points out that our priests do learn from us by our expectations. He reminds us that we have a right to expect our priests to act as priests, meeting the needs of those in their care.
A priest is not just a "guy’ to be left alone to do “as he pleases”. The priest in this discussion is not “teaching” anything worthy by dressing inappropriately, but young men in a CCD class who might have otherwise considered the priesthood are “learning” a lesson of disrepect and disobedience, even if it is unintended.
I would not confront this priest over his dress to save him being hurt or embarassed and to be respectful of him. He may not realize that his dress inappropriate. But I would bring it to the attention of the Dean of Priests in the diocese or your Bishop. They are very capable of counseling their priests with both charity and respect, and that is what is called for here.