Dating and back massages
BC 722-481: Huangdi Neijing is composed during the Chinese Spring and Autumn period (the beginning of recorded history).
The Nei-jing is a compilation of medical knowledge known up to that date, and is the foundation of Traditional Chinese Medicine.
In amateur settings, a general purpose surface like a bed or the floor is more common.
Aquatic massage and bodywork is performed with recipients submersed or floating in a warm-water therapy pool.
This is the oldest known visual representation of abortion.