Fire chiefs are concerned that the kinky film - starring Jamie Dornan as EL James' Christian Grey and Dakota Johnson as innocent Anastasia Steele - could lead to more call-outs to people who have become stuck or trapped in objects such as handcuffs and rings.
As the raunchy film hit cinemas in time for Valentine's Day, firefighters were bracing themselves for some embarrassing emergencies.
In 2013/14, firefighters attended 472 incidents involving people being trapped or stuck, often in everyday household items. The figure has steadily increased year-on-year since the Fifty Shades of Grey books were released, LFB said in a statement.
Between April 2014 to February 2015 there have been 393 incidents.
Launching a campaign called Fifty Shades of Red, the brigade is asking people to think carefully before getting themselves into sticky situations.
In November last year, firefighters came to the rescue of a man forced to undergo surgery to remove to metal rings that had been stuck on his penis for three days.
The man had attended A&E but when doctors found they couldn't remove the steel rings the brigade was called. Two firefighters scrubbed up and removed the rings using pedal cutters - a hydraulic handheld piece of cutting equipment.
The brigade is also regularly called out to incidents involving children - and sometimes pets - stuck in objects as well as hundreds of people with rings stuck on their fingers.
Since April 2013, the capital’s fire crews have been called out to:
- 14 incidents involving children with heads stuck in potties or toilet seats
- 28 incidents involving people being trapped in handcuffs
- 293 rings removed - including 7 instances of men with rings stuck on their penises
Each incident costs taxpayers at least £295, meaning the incidents over the past three years have cost a total of £388,810.
The brigade said that in the past its crews had been called to a man whose penis was stuck in a toaster, and another with his manhood trapped in a vacuum cleaner.
Despite the unusual nature of some of the incidents, the brigade was keen to stress that people should always call 999 in the case of a genuine emergency.
Third Officer Dave Brown said: "The Fifty Shades effect seems to spike handcuff incidents so we hope film-goers will use common sense and avoid leaving themselves red-faced.
"I'd like to remind everyone that 999 is an emergency number and should only be used as such. If there's a genuine emergency, fire crews will of course attend and will be on the scene to help within minutes."
In terms of which boroughs are the worst offenders, firefighters have attended 160 Fifty Shades of Red incidents in Bromley, more than in any other London borough, but the brigade also received 91 call-outs to Westminster, coming in fourth on the list.
People getting into a jam with rings, bracelets and watches are a common occurrence, while firefighters are also regularly called to assist people and children with their fingers trapped in electrical items like washing machines, sewing machines and heaters.
The most common type of call-out for this type of incident is to people with rings stuck on their fingers.
"Our advice is simple", said a brigade spokesman, "If the ring doesn't fit, don't force it on. As well as being painful, you could end up wasting emergency service time if you have to call us out."