It doesn't have to be a big "Talk". With my younger brother, I'd subtly rant, or tell him stats, or point out sexism, bullshit, etc. on a regular or daily basis. I feed him little bits and pieces and allow him to see the proof through his own eyes: "Hey, this shop has 20 employees and they're ALL females, I guess Zackcid was right about sexism against males", etc.

Nowadays, he's evolved really nicely and I can tell his life is getting better. If you don't want to shock him, give him subtle little pieces on a regular basis until he sees the big picture on his own.

All you can do is drop the right advice in his ear, and let it take hold.

For example, my old man once told me "If you are lucky, you will be able to count on your close family and one or two friends. Everyone else you meet in your whole life is just passing through, and you cannot count on them, so don't."

Another time he told me that women don't want an equal partner, they want to be dominated and led, to a greater or lesser extent.

I was a teenager at the time, and I didn't get the full meaning, but it stuck. Later life lessons drove his points home. Hard.

I always thought that was probably the best you can do. That and live your life in such a way that it serves as an example. When he sees you deal with people and situations with a reserved coolness, and a sense of ironic detachment and competence, he will likely model the behavior.

The ''only'' way you can introduce your son into the ''real'' world is through Game. Boys will pay extra-ultra attention if you tell them things on how to get more/better girls easier. He will listen to you, and he will remember. Make a guy to guy tradition out of it.

I took my sister's son to the lake one weekend and talked to him about how to approach women, what kind of men women are generally attracted to, how not to be a loser with them and in the heat of the conversation, I threw bits and pieces of info about false rape, forced fatherhood, protecting himself against female manipulation, fucked-up legal system, reading between the lines and stuff like that. He's been coming back and trying to find me alone to ask more ever since, and I've never seen him happier!

You know how before taking the redpill it seemed like society had brainwashed you into being bluepill? Well in this case you just need to counter the brainwashing with your own opinions. Watch tons of movies and tv shows with your son and point out examples of shame tactics and other BS that you see.

TL;DR: shove the redpill down his throat.

Show them this link - it's a catalogue of feminist shaming tactics, along with descriptions of the underlying fallacy and effective rational responses:

Exposing Feminism: Shaming Tactics

Beyond that, raise them to pursue their own goals without shame, and to seriously scrutinize anyone who tries to use platitudes rather than sound reasoning to oppose their ambitions.