Does nofap agrees with masturbation?

I found many users abstaining not only from pornography but from masturbation as well.

Anyway,here what I found on nofap intro description:

"NoFap is not an anti-masturbation website. A clear majority of NoFap’s users and administrators alike agree that there’s nothing inherently wrong with masturbation. A small number of users may believe otherwise, perhaps due to their moral principles, but find NoFap’s broad-minded approach works better for them than the moralistic focus of “chastity” websites that dot the Internet. NoFap does not encourage lifelong abstinence from masturbation or sexual behavior. Rather, we encourage our users to abstain for a period of time for the duration of their reboots—typically around ninety days. While some abstain for longer periods of time—even for life—most of our users then return to masturbation having freed themselves of the need to use pornography. Our users choose what is healthiest for them and best serves their goals".

In other words, is masturbation harmful or not? I've seen many who don't do it any longer. I even read one article on the Internet on the harmful spiritual effects of masturbation.

If pornography is so harmful why masturbation is not, as it can lead you to pornography?

 

If I masturbate once in a week without any pornography, is that harfmul?

 

I already got 2 different answers: One who disagrees with masturbation, talking about the importance of semen retention and one who agrees with it if it's done in a healthy manner.

I look forward to reduce my masturbation habit and do it once in a month.