Twelve zodiac signs

In Japan, there are JUNISHI, both calendars imported from China.
“JUNISHI” = “Twelve zodiac signs” is composed of twelve animals.

Dragon is one of JUNISHI.
It’s imaginary creature.

The couple is making love under the Waterfall from mouth of dragon.
There should be some SHUNGA painted other animals of Twelve zodiac signs.

Junishi no uchi
Artist Unknown