I don't know whether this has been posted before, but there was a nice tickling scene in a movie called Chicken Ranch, made some time in the 80s. It was a documentary about one of the legal brothels in Nevada. I don't remember too much of the movie except for this scene:
It showed two of the girls, a blonde and a brunette, chasing each other around a room. The brunette ended up sitting in a chair with the blonde on her lap; the blonde reached for the brunette's stomach, and she (brunette) pulled her hand away, saying "I'm not ticklish!" Then they started wrestling around, each one trying to tickle the other. At one point, the brunette got the blonde on the ribs, briefly. Finally, the blonde won; had the other girl on the floor and was getting set to tickle her stomach. Unfortunately, for some reason I can't remember, she didn't get to do it. Even so, it was a pretty nice scene.
It showed two of the girls, a blonde and a brunette, chasing each other around a room. The brunette ended up sitting in a chair with the blonde on her lap; the blonde reached for the brunette's stomach, and she (brunette) pulled her hand away, saying "I'm not ticklish!" Then they started wrestling around, each one trying to tickle the other. At one point, the brunette got the blonde on the ribs, briefly. Finally, the blonde won; had the other girl on the floor and was getting set to tickle her stomach. Unfortunately, for some reason I can't remember, she didn't get to do it. Even so, it was a pretty nice scene.