Kappy pointed anons to turkish bathhouses. A tradition going back a long long time. Not all baths are done in water. Certainly not by conquering tyrants- see who built the oldest Turkish bathhouse in Istanbul.
Anons know consuming blood and human organ material has life extension/rejuvenating effects. So does bathing in it. Your skin/hair is an absorptive organ
Hostel 2 provides a glimpse in the”bath” scene…