Reincarnated as a Scumbag, I Use My Wife and Daughter to Prove Immortality - Ch. 19

[MangaDex]

 

[darelord]

So cultivation through sex is a thing huh.

 

[notelgis]

So cultivation through sex is a thing huh.

Yuppp so-called "Dual cultivation" does have a basis is some more obscure Taoist schools. They believed that a man should have sex, but stop just before climax to absorb energy. But if the man ejaculates, then the woman steals all his yang energy. Edging in order to cultivate immortality.