So said a Curate of my acquaintance tonight.
I agree with him, it's tricky. One person's amusing is often another's offensive. One person's harmless is a cause of great concern for another person and so on. The boundaries are constantly changing as society develops and understands more of the world, and the people with whom they share it.
The phrase often heard is "S/he took it too far..." Jeremy Clarkson, Frankie Boyle, are two television personalities who have been accused (rightly in my opinion) of doing this.
As a Christian with a reasonably developed sense of humour, I feel that certain things are clearer than others. For instance this is the t-shirt that inspired this blog post, and this made me respond with a big fat "Ewwwww". Not good. Along with the classic Nice Legs - What time do they open? Somebody somewhere finds this amusing - the aforementioned Nice Legs t-shirt has sold out. "The Vicar's Wife" has actually witnessed one of these high quality t-shirts on an actual human. Now, seeing women as sexual objects who open their legs automatically on the orders of a stupid t-shirt has crossed the line with me I'm afraid.