Revealing mistake: When Carrie bumps into Mr. Big and her purse falls, watch the people in the background carefully. Many of them are watching the couple talk and interact with each other. On a busy New York street nobody is going to pay attention to two people having a conversation. Apparently all these people were watching the shooting of the scene.
The power of female sex - S1-E5
Revealing mistake: The first aerial shot of the trendy restaurant the first time Carrie and Sam go, is the very same shot used when Carrie goes again and says "another Saturday night." (00:00:58 - 00:18:26)
The power of female sex - S1-E5
Revealing mistake: The very first aerial shot of Balzac the first day Carrie and Sam go, is the exact same shot when they go again several days later. (00:00:58 - 00:18:25)
Answer: A popular brand of sexual lubricant. See http://www.k-y.com/index.jsp.
J I Cohen