My Three Sons (1960)
S02E26 Casanova Trouble
Episode Overview
When Steve's friend expresses her concerns about her daughter dating an older guy, he offers to help. He’s taken aback when he discovers that the fraternity pin the young man gave her has the initials of his eldest son, Mike. However, it turns out that it was actually Robbie who borrowed Mike's pin to repair his shirt, which was missing buttons.