A theme in fictional works where a character who sees themselves as "impure" (common examples in erotic works are non-virgins, prostitutes, used goods, and damaged goods; common examples in non-erotic works are criminals, sinners, and people with zero sense of self-worth in general) is moved by the compassion of another character, hence "purified". The important part is that the impure character no longer feels impure, either temporarily or permanently.
Non-virgin: You shouldn't fall in love with me. I'm... not a virgin.
Chad: That doesn't matter to me. I love you, no matter what you are.
Reader: So this is purification... not bad at all...
The theory to suppress and feminize a society into a bunch of whining and highly offended pussies. Mainly effected are men who are confused on how it is to be an man. The goal is to pussify the masses so they are easily controlled