More tea, Zuko?

I was reading the zutara fanfiction Dangerous Ground by Wilderness-writer (ff.net) and thinking about a fanart I could draw about it (it's such a good fanfiction I'm really inspired!), but what really caught my attention was this author's note:

"Author’s Note: Did you know that Ginseng tea is used to promote... um... how do I put this so it’s safe for any of my young readers... it’s used to promote stamina and performance and to stimulate certain hormone-producing glands. wink wink (My mother is an herbologist and I read her books when I can’t fall asleep at night).

Hmmmm... makes you wonder why Iroh is always trying to feed Zuko ginseng tea, eh?

Grandchildren, anyone?"

Needless to say... this image came suddenly into my mind.