Living capital, which has the special capacity to continuously regenerate itself, is ultimately the source of all real wealth. To destroy it for money, a simple number with no intrinsic value, is an act of collective insanity - which makes capitalism a mental, as well as physical pathology.
There were a couple of instances where what I'm thinking during sex was relevant, so I might as well show myself having sex. I could have gone from a shot of the bed to just showing the ceiling and my thought bubble. Or maybe just show the feet.