How can one deal with two children who exposed their private parts to each other, and what are the best educational methods to solve this psychological problem that resulted from the father's harsh reaction?

The father deals wisely and balancedly with his children's mistakes, striving to understand the source of their erroneous behavior and steering them away from it. This feeling will fade after a period of dealing with them gently. Furthermore, the Prophet's (peace be upon him) saying, "And separate them in their beds," should be applied, and the abhorrence of this act should be explained to them, and that Satan desires it, as Allah Almighty said: "He strips them of their clothing to expose their private parts to them." He should also remind them of the Hadith: "Guard your private parts except from your wife or what your right hand possesses," and that this act is committed by evil people.