Why does jerking off using my imagination not as, if at all, blunting to my mental capabilities?
The more I jerk off to porn, the worse brain fog I get. However, when I use my imagination only with no porn, I don't get any brain fog.

How does that work?
Does jerking off to porn activate completely different regions than using my imagination only?

Please, don't give me a nofap lecture, I know.