I used to watch my neighbor's son jerk off at our beach house.
I would go out on my deck everyday in my robe, lean against the rail, drink my coffee and watch.

It was always the same...right around 10:30 in the morning he would go outside and sneak into the dunes.
He would drop his pants and masturbate....everyday.
He would really pump hard.

After watching this for a while I decided to make some noise and let my robe slip open.
The first few times he didn't notice but one day he heard me.
I acted like I didn't see him.
After a minute or two he carried on as usual.

I made a point of saying hello to him when I saw him in town.
He usually turned a little red and hurried away.
It still turns me on.