Is it really normal for guys to do “self-pleasure”?

Hi, I’ve been a silent reader here for a while, and I noticed there are discussions about masturbating. I’m genuinely curious, do most guys actually do it? Like, is it considered a normal thing for men?

And random question hahaha, what happens if you don’t masturbate for a long time? Does it affect you in any way?

I honestly just don’t fully understand it yet, so I’m curious to hear different perspectives 😅 Thanks!