Movies
When a guy picks a chick over his buddies, somethin' gotta be wrong!
— Sonny · Grease

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker objects to a man choosing a romantic partner over his friends. That choice is treated as a sign that something must be wrong. The complaint puts loyalty to the group first, taking the decision itself as grounds for questioning the man's judgment.
Context reviewed