TV
It's really debilitating being crazy about somebody. You lose 20 IQ points every time you see them.
— Lister · Red Dwarf
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker jokes that being besotted is a handicap, because merely seeing the beloved makes them dim. Twenty lost IQ points per encounter exaggerates how infatuation scrambles thinking, leaving a person flustered and foolish. The humour is rueful, confessing helplessness rather than boasting of romance.
Context reviewed