Types of Masculinity

What does it mean, to be a man? To be masculine? What does it mean to be a man who is the hero of a romance novel?Romance readers, including me, often talk about "alpha" or "beta" heroes as two generalized types. The alpha can be seen as a protector and/or a provider (rich in money or at least in skills) as well as a person with a need to dominate a relationship, or at least romantic