Continuity mistake: After Carrie has sex, Kurt's grey underwear way below his groin (to protect his modesty) is briefly seen. (00:12:16)
Other mistake: When Carrie opens the newspaper to read her column, the same paragraph is repeated at least twice.
Continuity mistake: When Miranda recalls the Linda Fiorentino movie, Carrie's right arm swaps between holding a cocktail or resting empty handed by her lap.
Continuity mistake: When the couple is practising golf, the sky has dusk light, but in the immediate shot it is bright blue.
Continuity mistake: When Sam leaves her pearly thong on top of the papers, the pearls lie on the papers in the first shot, but over the fabric in the close-up.
Cover girl - S5-E4
Continuity mistake: When the weightwatchers guy is about to leave Miranda, her hands are crossed over her tummy or not, depending on the shot.
Continuity mistake: During breakfast, in the back shots of blonde Sam a brunette stand-in takes her place.
Continuity mistake: Sam says she's never going to f*ck Carrie and puts her arm around her. A shot later the arm is gone. (00:02:10)
Continuity mistake: When Carrie picks up Miranda she is standing still in both the front and back shots. Then Miranda starts to move and says "I'm kidding!" but the angle shot from behind still shows her stiff as a stick.
Cover girl - S5-E4
Continuity mistake: The second time a guy goes down on Miranda the sheets cover his nape or not depending on the shot.
Cover girl - S5-E4
Continuity mistake: When Sam asks for Stanford's boyfriend's opinion she is 30 centimetres away from Stanford. When the shot changes she is a metre away.
Cover girl - S5-E4
Continuity mistake: Carrie discards all the dresses and Sam lowers the ones she holds down to knee level. From the opposite angle she is holding them at chest level.
Cover girl - S5-E4
Continuity mistake: When Sam chooses dresses for Carrie her hand is either on top of the clothes hangers or behind, depending on the shot.
Cover girl - S5-E4
Continuity mistake: While choosing dresses, Carrie is holding the clothes rack or not depending on the shot. This swaps back and forth.
Cover girl - S5-E4
Continuity mistake: During breakfast, Carrie stops sipping form the straw and raises her head. From another angle she is still sipping.
Cover girl - S5-E4
Continuity mistake: The second time Miranda bites her Krispy Kreme, its shape changes at least 3 times.
Cover girl - S5-E4
Continuity mistake: When a woman picks up the book on the floor her bag is falling off her shoulder, sliding down her arm. A shot later it's resting on its shoulder.
Continuity mistake: Carrie enters the chapel with Miranda and says the godfather smells bad. Carrie places her arm around Miranda, but it disappears a shot later.
Cover girl - S5-E4
Continuity mistake: When a woman picks up the book Charlotte threw the curb, the place where she is standing changes between shots: in the close-up she is suddenly next to the edge of a cement block.
Revealing mistake: When the baby is about to be baptised, it is replaced by a blatant doll: The doll's arm is stretched out (as opposed to the real baby's arms, tucked in his robe), and the doll's hair is very obviously painted.
Answer: A popular brand of sexual lubricant. See http://www.k-y.com/index.jsp.
J I Cohen