I'll gladly stretch those ladies out in various ways
No sexualized thoughts arising, while still having an erection - it's said that then cultivating Jing starts.
Crane Deer Turtle
I learned various exercises that correspond to these animals. They only make sense once you add the locks.
Crane needs one stable leg or stake to stand on
Deer (and other horizontally living animals) need to have tonified abdominal fascia so their organs don't just slosh around
Turtle's back is always strong, stretched, protected even when relaxed. The half circle is used to elongate the back side.
However, don't engage these locks all of the time or you'll fuck yourself up
Train the tissue so the connection becomes stronger, but don't hold onto that connection, let it arise naturally and from relaxation. You fall back to the level of your training, they say.
When looking at dantians, storing is the wrong term IMO. I like accumulating better, or rather increasing the volume of a body of fluid, while simultaneously increasing the flow of that liquid in terms of volume and speed. You don't fill and then lock the containers. It's more of... installing better pumps (or gradually training them) and increasing the total amount of fluid in the connected reservoirs.
As for trying to squeeze energy out via contracting specific muscles... Just connect other people to your flow and then move. Don't worry about squeezing.