What does Robert Greene think masculinity should be?

It appears that there are no clips available from the Huberman Lab podcast that provide information on Robert Greene's views on what masculinity should be. As such, I cannot provide a response based on what Robert Greene thinks about this topic in the context of the Huberman Lab podcast data. If you're looking specifically for Robert Greene's insights from Huberman Lab, you might want to check out full episodes or other sources where he may have shared his thoughts on masculinity.