Can someone explain all these cultivation terms, or are they all made up? I can understand the jist thanks to context clues, but I'm curious if any details are for real. For example, what is Dual Cultivation? What is a Furnace? Are Furnaces usually used in a lewd manner, or is the author adding that twist to it?
-Dual cultivation does exist on other where else. Since they believe that men and women can cultivate the different types of power and then process to cultivate together for even more stronger stuff.(Although it may or may not be lewd, because there are something like siblings practice sun(fire) and moon(ice/water) then do it similarly but minus the lewd.)
-Furnace are basically forced version. Usual are lewd manners but yeah. Maybe it doesn't have to be but usually it's worked that way for both gender.