1) What is the strongest display of public affection you have ever witnessed, and how did you react to it? 2) At what point do you think PDA becomes improper? I feel the first answer (comfortable with descretion) and the 2nd answer (uncomfortable with no restraint) are the same in my books. 1) Bare buttocks going up and down through the rear window of one of those small ford panel vans (i guess they don't call 'em shaggin' wagons for nothing!. Oh and broad daylight so you didn't have to cast more than an aside glance to see. 2) A little disturbed. I was young and although I knew the biology of sex at the time was not aware it could look so violent!