Fred Aceves’s The New David Espinoza (2020) is a young adult narrative that offers a critical lens on the construction of male body image within contemporary American peer culture. This article explores how the novel represents body anxiety, muscular idealization, and toxic masculinity as interrelated processes influenced by disciplinary surveillance across social, institutional, and digital spaces. The study draws from Foucault’s concept of bodily surveillance, Connell’s notion of hegemonic masculinity, Butler’s idea of bodily vulnerability, and Goffman’s dramaturgical model in analyzing the continuous regulation of adolescent male embodiment through the lens of peer judgment, gym culture, steroid use, and internalized self-monitoring. It argues that the protagonist David’s quest for a muscular physique is not an individual psychological battle but rather a social construction in response to the normative masculine standards. By placing Aceves’s narrative within broader debates regarding body positivity discourse in young adult literature, neoliberal selfhood, and gendered embodiment, the study contends that the novel complicates celebratory notions of self-acceptance. Ultimately, it suggests that male body image is formed through entangled structures of power that render self-love an ongoing, unstable negotiation rather than a static resolution.