The quote reflects a woman's perspective on boys and men, expressing her belief that they share a common viewpoint about their masculinity. She implies that they carry an inflated sense of pride regarding their identity and accomplishments, which she finds amusingly misguided.
This observation highlights a broader commentary on gender dynamics, where she perceives men as lacking self-awareness. Despite their confidence, she suggests that their attitudes can come across as naive or foolish, indicating a disconnect between their self-image and reality.