The urge to PMO multiple times if i relapse once is gone, improvement?

I'm just curious as to whether the fact that when i have relapsed recently it has just been one PMO and i don't necessarily feel the need to do it over and over, is there a reason for this and has anyone else had this experience. I used to need to do it all day until the point i would be MO'ing with a semi, but in recent times after once i can go about my day with relative normality besides the slight depression regret for breaking my streak.
I also tend to go into flatline very fast now and the brainfog and headaches start in a couple of days and the morning wood and random erections come back within a week or so.
Is this my brain starting to rewire itself a bit faster or something else? Just curious on other NoFappers thoughts with a bit more experience and knowledge.

Cheers in advance.