Cheating fathers can have a number of negative effects on their sons. First and foremost, it can damage the son's relationship with his father. Cheating can also lead to feelings of betrayal, anger, and resentment. Additionally, it can cause the son to question his own self-worth and trustworthiness. In some cases, it may even lead to the son following in his father's footsteps and cheating on future partners. Ultimately, cheating fathers can have a lasting impact on their sons that extends far beyond just the initial relationship between father and son.