Does excessive masturbation leads to emptying sperm and semen... can anyone explain?

no it doesn't and no it won't, your body keeps making more and more over your life time

First explain = "excessive masturbation",

Practically impossible as body will not let
you empty the sperm tanks.

You are making 50 million sperm a day and
more if you over 16.

Semen is made on demand = it is not stored.

So the prehistoric rubbish you see on NoFap
sites is wrong.

Your body can do an awful lot of sex.
But will stop you if you do it "too much".

< M

1

you body produces continuously it, a certain quantity every day. like milk for a cow, sometimes more, other less. for all your life. not difficult, yes-no?