I have headcanon about how Lin was conceived.
>Police Chief Toph has the pick of the litter of new recruits
>when her target is alone in the training gym she slips in and just leans against the wall, grinning
>"Can I help you chief?"
>"No, I'm just enjoying the view" she says while staring off into space.
>The recruit goes back to practicing
>A minute later Toph, bear foot, walks over
>"You have nice form, recruit, but you stance is sloppy".
>Toph positions herself behind him, their bodies touching
>Toph corrects the stance, they are so close that the recruit can't help but also alter his stance
>Toph leans over to his ear "do you feel that"?
>"the better balance you have? The spring you have when you are lower to the ground?"
>Toph backs away and walks to his front, casually brushing her hand across his back
>"Show me some moves."
>The recruit does some training moves, as if he were handling police metal cable.
>"Not bad, but I think you would benefit from some private lessons."
>Toph pauses to let it sink in.
>"Private lessons, chief"?
>"That sound good to you?"
>"Good. Tonight, 6:30, 12th street, Chestnut-Berry Apartments, ground level, apartment 4, bring sake".
>Toph walks past him, slaps his ass, and walks out.
>the next morning, Toph half dressed already and recruit Lau just waking up
>"You had damn fine form last night for a young guy, Lau" Toph said holding a cup of tea.
>"Thanks, Toph. Last night was amazing. How did you do that thing, that thing with your feet..."
>"Practice. Now get your pants on... and Lau".
>"That's chief Bei-Fong to you".