Samantha for the Defense - S3-E14
Factual error: Benjamin Franklin is portrayed as a gentleman in this episode and the previous My Friend Ben episode. In this episode he dates Aunt Clara at the end. In reality, Benjamin Franklin was a cad, a womanizer and a playboy. He was a marvellous man - a genius - but treated women terribly refusing to marry his common law wife, abandoning her for years while he played with other women in Europe... and treated his daughter like a second class citizen.
Answer: Larry had been telling Darrin what it means psychologically that Samantha gave the coat away. Larry said giving it away meant she's happy being married but if she liked the coat it means she desires to be single and carefree. So when Darrin sees the coat, he immediately thinks Samantha doesn't want to be married and the fact that she twitched it means (in his mind) she wants to be a single, carefree witch again.
Bishop73