Characters
When you're a Jet, you're a Jet all the way! From your first cigarette to your last dying day!
— Riff ‧ West Side Story

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Being a Jet is described as an identity that lasts through an entire life. The repeated name and insistence on belonging all the way leave little room for a temporary attachment. The span from first cigarette to death gives that loyalty an emphatic, absolute form.
Context reviewed