This movie - Rita, Sue and Bob Too! - is an excellent comedy by the British director Alan Clarke (who also directed films like "Scum" and "Made In Britain"). If you have seen those films or know of Clarke, this will give a clue about the setting - it's typically working-class with no sentimentality or condescension. The film itself is essentially a sex comedy, with a man (Bob, surprisingly enough) in a stale marraige conducting an affair with their teenaged babysitters, and the (mis)adventures resulting.
But the film is also an extremely sharp analysis of class and social mores in the mid-1980s, with Bob an example of the successful working-class man in a middle-class environment, Rita and Sue in a school straight out of "Kes", and Sue's shoddy homelife is shown precisely, yet humourously and empathetically. Similarly, the interlude where Sue dates an Asian boy is deft and precise, but still funny (the scene where he invites her to "lie down" is classic, and a lesson for all shy boys out there...).
Although the precision of the setting does date the film, the warmth, satire and social commentary remain, making this a little gem of a film. It's also unusually humourous for an Alan Clarke film or play, which are usually searingly intense, but a little light relief is a good thing, as I'm sure Bob would agree!
All-in-all, Rita, Sue and Bob Too! is one of those films you'll want to watch again and again.
Rita, Sue and Bob Too! - Dance music mash-up
If you've never seen this film before, then here's a little teaser I have found for you - which someone has mixed in with some dance music, which might not be your cup-of-tea - that will give you an idea of what's in store for you when you do see it.
Warning: The following video is NSFW (not safe for work)...
the_real_linda

I have LOVED this movie for years (yes my mum let me watch it when i was young, an education film for a youngster but brilliant and maybe funnier and funnier each time i see it)