A little known secret of actors: you can force yourself to cry by simply thinking about how badly you want to.
Here's how it's done.
Start with fertilizer. Remember how you felt that first year you did so excellently at school, all-year struggling and so devoted, woke up Christmas to your mother's purchase, eager for sugar plums and hedonist things, ripped merrily into math workbooks. The seed comes next, budding in the open tunnels of self-worth - when he told you that the thing you were best used for could be done by anyone, really, the oldest profession, and how you liberated your oils on canvas long exiled to make a scene of Rahab and Joshua, and cried yourself away on alien bedding.
Water it all in whatever leaves the garden hose.
When they whistled without a name. When your first time hosting supper was a catastrophe. When you failed to keep certain things alive. When the housecat burrowed in your warm motor, and you just wanted to leave so badly.
Funerals of people you never knew, and bugspray in your eyes.