Masculinity in Tolkien

In a review of "The Return of the King" published in the Observer in 1955, Edwin Muir criticizes that "all the characters are boys masquerading as adult heroes [...] and will never come to puberty [...]. Hardly one of them knows anything about women," and similar observations have been made by critics over time. Yet can Tolkien's portrayal of masculinity truly be reduced to such a simple formula? Are his men all simply "boys" or, as other critics argue, simplistic good heroes, a romanticize...