Masturbation can lower dopamine and oxytocin. These are "happy hormones".
Masturbation can increase prolactin, which is something like a stress hormone.
"After orgasm, various studies have shown that prolactin levels increase, whereas oxytocin and dopamine levels decrease significantly [12–19, 23]."
Now, of course, many have noticed that they feel happier when not masturbating for a long time.
The longest I have gone without masturbation is maybe a month.
But its so hard.
You have to work all the time to forget about masturbation.
Sure, you feel better when not masturbating. But you also feel urge all the time.
I wonder why did God create such a nasty urge.
God, that is not funny.