A Chinese Joke.... ??

Kungfupanda01

So, we are out at dinner the other night, and Johnny decides to tell us a joke in Chinese.
Here it is, translated:

So... There is a man, running out of the forest. Another man sees him running, and asks: "Why are you running?" The first man replies:"There is a panda in the forest. Whatever you do, do NOT touch his nose." Curious, the second man ignores the first man and enters the forest.

After walking for quite a while, he comes upon a sleeping panda. He can't resist, and touches the panda's nose. The panda then chases the man through the forest, and eventually the man gets too tired and can't run anymore.

The panda then tells the man "I just want to touch your nose."
.....

That was it. I don't get it.