Vegan Forum

I am an ethical vegetarian, and when I am asked why I am vegetarian I say for ethical reasons. Then I find it hard to explain what is the position of vegan ethics.
So here comes the question: What is the best way to explain to somebody the concept of vegan ethics?

Vegan ethics.. hm...
When somebody asks me about why I don't eat animals and wear leather, before I used to answer: Because of ethical reasons. Then I either had to dully explain them what are vegan ethics or the conversation ended because the word ethics for some is too abstract and they were not interested.

Now I just say: For the same reason you don't eat people and wear their skin. That pretty much explains everything, and the guy instantly is in the same boat with me. Whatever he tries to say against me is used against him, but one have to be careful, some may start thinking that eating humans is ok after such a conversation.