I'm unsure if I should be disturbed or not, but I'm struggling to get this image out of my brain. 
Was walking through a car park along the pedestrian lane, with my 5 y/o and many other shoppers. Stopped to let someone past with a trolley, and saw a man in the drivers' seat of the parked car next to me, head back, looking to be asleep, with (what I thought) was a small dog on his lap.
The 'dog' had long silky hair, and he was stroking it enthusiastically... took a closer look and realized it was a woman's head and a BJ was being carried out in full view of us passersby.
I couldn't pass by fast enough. What are people thinking? So relieved DS didn't seem to notice so I didn't have to explain that one.