Continuity mistake: Miranda's baby is definitely not the same baby that appeared in the previous episode.
Continuity mistake: When Miranda takes out the strip of condoms, they swap between falling straight to zigzag shape between shots. Also the way she holds them changes between shots.
Continuity mistake: Charlotte says she has to go to the synagogue and one can see Miranda is holding her glass at chest level. From the opposite angle it is by her mouth.
Continuity mistake: Sam goes to flirt with the waiter while Charlotte has a sip. A shot later her arm is already down, without her having lowered it.
Continuity mistake: When Berger tells Carrie they must make the bed, her left arm is next to her body. A shot later it's stretched out.
Continuity mistake: Carrie and Berger wake up and he says "We're the couple you wanna be" and her legs are stretched out. A shot later they're bent under her bum.
Continuity mistake: After the drinks night, Carrie and Berger start to kiss. He is on top of her and she places her hand on his chest. A shot later it's around his neck. (00:02:35 - 00:24:39)
Continuity mistake: When Carrie wakes up with Berger, her hair covers half of her face and is neatly brushed. From a wide angle it doesn't and it's quite messy.
Continuity mistake: When the lingerie clerk shows the blue dress she holds the clothes hanger from the middle part. From the opposite angle she is holding it from the side.
Continuity mistake: When Sam asks the clerk for specific lingerie, the dress is close to her and she touches it with a her right hand. From the opposite angle her arm is lowered and her left arm holds the dress away from her. (00:13:35)
Continuity mistake: When Sam and Carrie go to the lingerie store, Sam raises her right arm to touch a blue dress. From the opposite shot her arm is lowered.
Continuity mistake: Miranda's pizza is sometimes stiff, others really fluffy, other so-so. Also, the size of the bite changes between shots.
Continuity mistake: While eating a burger, Berger wipes off food from Carrie's mouth and the ketchup bottle magically disappears from the table.
Continuity mistake: When Carrie and Berger enter the Lincoln Center there's a man behind Berger smoking. When they enter the place a second later, the man has vanished.
Continuity mistake: While the girls wait for their table, check the apple on Sam's cocktail and you'll notice that the glass' position is inconsistent between shots.
Continuity mistake: Right when the episode starts Carrie is grabbing a long piece of melted cheese that stretches out of her burger into her mouth. Half a second later the burger and cheese have vanished. And her arm is lowered.
Continuity mistake: When Carrie and Miranda talk while sitting on the bench, a couple suddenly appears behind them.
Continuity mistake: When Miranda dines with Steve her menu is lying on the plate or resting on her bosom, depending on the shot.
Continuity mistake: When Carrie's date splashes vinegar on his sty, the position of his left arm is inconsistent in every single shot.
Continuity mistake: Charlotte asks Carrie how many outfits has she bought, and takes her left arm to her hair. Half a second later her arm is lowered. (00:01:30 - 00:13:29)
Answer: A popular brand of sexual lubricant. See http://www.k-y.com/index.jsp.
J I Cohen