Flower & Snake (1974)

[Dr. Bill Kobb]

There's a decent scene in this old Nikkatsu movie where a woman is bound and teased by another, older woman and then also by a man who joins in. At first it's just the older woman teasing her with a peacock feather, but when the man enters, the older woman switches to a wooden back scratcher. Some screenshots below to give some idea.

 

[milagros317]

Great photos! Thanks for sharing them here.