Saucy British postcard humour throughout similar to Carry On series of movies, a running joke is that the wife of the main character would prefer they had sex more often, there's also some mild references and puns (Uranus, vibrating fingers etc)
Innuendo and sex references in every episode. This has been toned down by series 2, but is very much still present.
Profanity
Mild
Mild Language mostly. The strongest word used is bastard.