Sylvester Stallone stated in interviews that the idea behind the three seashells was that two were used like chopsticks or to clamp together to pull waste out of the body and the third was used to scrape what was left over.
Lenina Huxley mentions a "Schwarzenegger Presidential Library", explaining that, based on the sheer popularity of his movies, a Constitutional amendment was passed in order for Arnold Schwarzenegger to run for president, which, according to Huxley, he did. In 2003, ten years after this film's release, Arnold Schwarzenegger was elected governor of California and shortly after his election, three senators separately proposed amendments to the US Constitution to allow naturalized citizens to become president.
Lori Petty was chosen to portray Lenina Huxley, but was replaced by Sandra Bullock after only a few days of filming.