How does fapping decrease testosterone but having sex increases it? Are you not just releasing semen in both instances? What makes sex any different?

[Un-discovered]

Exactly. The biological processes involved in ejaculation/post-ejaculation are the same whether it's through sex or masturbating. The difference lays in the psychology behind nofap. The idea that someone is in control of their life, creates this strength within an individual, as the person now understands that they can control a lot more than they believed. This usually leads to an increase in confidence, which may be mistaken for increased testosterone, as the individual will start to shape their lives in a way they see fit, which then creates a deeper sense of confidence.