i disagree, i'm think if a man can have multiple orgasms and deep spiritualy sex whiout losing a drop of semen is the best you can achive. I don't want just reboot my brain, i want to transcend the art of sex haha why did you think it's a "artificial stimulating stuff"? for me it's the real sex and how it should be done.
I know that many people have said this is dangerous, and Chia's advice has caused permanent damage. If their claims about energy are true, that makes sense and historically only advanced adepts would be taught sexual tantra.