Speaking for myself: I masturbate about five times a week. The urge for anything sexual almost completely goes away after finishing. Fellow men, you know that feeling. Sometimes I'll go a week or so without doing masturbating, other times I might do it twice a day. It does depend on fatigue, how horny I am, and how long it's been since my last 'release' with another person.
Speaking for a male friend: he is about 24 years old and pretty much asexual, but kind of an odd one. He enjoys hentai, particularly for the comically huge boobs and weird situations the characters find themselves in. He's curious and has asked my friend group about sex and sexual experiences, but claims to have never masturbated, and doesn't watch porn. For a while, a few years ago, he was in a one-sided situationship with another friend of mine. Let's call him "Patrick" and her "Cara" ...
Cara was very into him, and he was very kind to her, but he was also quite clear that he didn't want to date her, and just wanted to be friends. I was told that there were more than a few times they were together and she really wanted to do more physical things with him. For example, another friend said she saw the Patrick and Cara on a video call together, and Cara was being very affectionate, such as pulling up his shirt to rub his stomach, and trying to snuggle closely with him. Cara would also at times simply ogle Patrick when he was shirtless, or run her hand through his hair. Patrick later confessed to being extremely uncomfortable whenever Cara would do those things, but he didn't know how to stand up for himself because Cara would shut down and not take it well - at all - if he rejected her advances. He said he didn't even get an erection when she touched him! Anyway, she would get upset and give him the silent treatment for a while until he apologized. For a lot of us guys, that's a situation nearly unimaginable, especially considering that Cara is, at least to me, not unattractive.
So I believe Patrick when he says he doesn't masturbate. When he asked me some questions about how both male and female genitalia worked, yeah, that pretty much cemented that fact for me.