Though he plays 20-something Sam, Timothy Olyphant is only three years younger than Sarah Jessica Parker and had already turned 30 when this episode aired.
Instead of using the "555" telephone numbers normally used on TV, the producers purchased two real phone numbers, which they used over and over again throughout the show.
Sarah Jessica Parker counts this particular episode as her personal series favorite. She revealed this to host James Lipton as a guest on Sarah Jessica Parker (2008).
Sam's tongue piercing is not real. The camera cuts to a shot of someone else's tongue piercing.
When Carrie is narrating while in the bar with the 20-something guy Sam, she says something like "While I took a sip of my pony neck bottle..." while she is clearly drinking a long neck bottle, the standard in virtually every U.S. bar. A pony is an 8 oz bottle, which were popular in the late '70s/early '80s but most breweries no longer bottle in that size.