One of my favourite quotes from Crocodile Dundee was when Mick arrived in New York and was being shown his opulent hotel room. ON being shown the bathroom, he is confronted with two toilets. Amazed, he calls out, "Hey Sue, some nitwit's put two dunnies in here"
It just goes to show that humour can be gentle and doesn't need to rely on bad language or swear words.
Note: As the video clip is not a youtube one, I can only provide the link.