can anyone answer if i see a couple having fun in a car or in a park how will i let them know i am looking and how will i know they want me to look with out saying anything
Not being smart but presumably if they don't drive off, you're grand to watch!
just park up switch all your lights off and wait,
normally after a while you should see flashing break lights or roof lights this is the usual sign that there will be some dogging on show.
Hope this helps.
Doc