I once worked as an in-home care provider for a bed ridden elderly guy. The living room had this huge window that was covered with a mirror like film where I could look out but couldn't be seen inside.
Just down the street was a school. Everyday I started to notice the hottest asian mom in an suv would park in front of the house(window) about 30-45 minutes before school let out and just sat there.
The idea of a slow methodical totally naked dick stroking 35 feet from a hot MILF did not take long to envisage. I started to build a routine so that my client needed nothing at 2:00 every afternoon. I would set up some down pillows in a somewhat inflated tube from a tire right in front of the window. I could lay down with my dick lovingly smothered in down and look directly at goddess mom. With pillows also supporting my upper body I could squirm and writhe the tip of my cock on the soft bouncy pillow. as long as I didn't squeeze my asshole I could just live in joyous pleasurable waves of ecstasy for at least a half hour a day staring and masturbating in what felt like plain sight. Sometimes she would have to clean out her car and I cannot describe the feeling of arousal when she would bend over in tight jeans as I pumped my rigid cock. She never knew how much pleasure she provided me.