Bringing Up Men Properly.

 It has been done for many decades even before Feminism introduced some of its idiocies that made it harder.  It helps if there are at least a couple of strong, competent females in the family, and the men, if any, do not preach the toxic masculinity dogma by example and word.  Note that the above combination was extremely rare prior to the 21st Century as toxic males were unable to deal with strong, competent females and therefore seldom had one as a co-parent. In the 21st century the option is generally dealing with strong competent women as partners or become an incel.  Note that the latter is still a common choice.

 The essence of the technique is taking notice of each example of toxic masculinity and pointing out, usually satirically, how bad a particular behavior is: 

• A couple of teens peeled away from a corner then slowed down for the attractive woman and the manchild with her to notice.  She did. "God! Am I ever impressed." dripping with satire. It should be noted that both the manchild and the showoffs got the message clearly. 
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   Such behavior will not get a desired response from a strong, competent woman.  If the manchild is being socialized to admire strong competent women the lesson will be remembered for life.

 The other component of the technique is the socialization of the manchild to admire strong competent women by example and pointing out the unattractive attributes of the traditional family next door.  Not to the extent of making the family next door lesser or unworthy of respect and neighborliness but pointing out the role disequilibrium of the parents and how each compensates.  

• A young woman was a concert quality pianist in her early teens.  Her much younger brother learned about practice, and dedication to an art by playing in the room as she practiced.  The two of them went to a major city department store where a Grand Piano was roped off for display in the lobby.  She went under the rope, and started playing drawing a crowd.  The rent-a-cop sarcastically asked her if she saw the rope, and she said it was roped off for her recital.  The rent-a-cop got the manager of the piano department, who saw the crowd and said she was right.
• A woman activist mother took on the city to light up a major playground so children could play safely after dark long before women were allowed to be politically active.  The city said no way it was too expensive but nevertheless she persisted.  And won.  Her manchild could recite the killowats needed to just turn the lights on, and the kWhs to keep them on.