Not sure where you get that from, it doesn't need to be un-PC to be funny. It takes the piss out of dark stuff like paedophilia, violence, masterbation etc but it doesn't dip 'ironically' (as some do nowadays) into racism, sexism and homophobia. It's just intelligently written. It's refreshing.
I was hesitant it being a BBC3 comedy and it's has it's cheesy moments, but its been an enjoyable series. Episode 3 was a bit bland but in sit-comland, episode 3 is usually the filler. They even got a John Terry joke in last episode.
It's intelligent writing with decent story arcs.