"Kissing the shuttle" is the term for a process by which weavers used their mouths to pull thread through the eye of a shuttle when the pirn was replaced. The same shuttles were used by many weavers, and the practice was unpopular. It was outlawed in the U.S. state of Massachusetts in 1911 but continued even after it had been outlawed in Lancashire, England in 1952. The Lancashire cotton industry was loath to invest in hand-threaded shuttles, or in the more productive Northrop automatic looms with self-threading shuttles, which were introduced in 1902.