Alpha pheromones are some of the most powerful substances on Earth for one compelling reason: they control the minds and hearts of inferiors.
Just the act shown here (something not done enough by Alphas, frankly) uses scent training in a demeaning way. The faggot isn’t worthy of even seeing its young Master’s cock or smelling it directly. No, it’s essentially “fed” his scent instead. Humiliating!
But ultimately, scent training works. It lingers in the fag brain long after the Alpha has disappeared from its life.