Basically people who believe in pseudoscience about "retaining" being good for you (which is the opposite of what medical research has proved) and/or a sign of mental fortitude, nonsense like that.

To make matters worse, there's a lot of overlap with "men's rights" and other organized misogyny groups such as Proud Boys and toxic masculinity peddlers such as Andrew Tate and the like.

TL;DR: It's silly at best, and deeply problematic if not downright harmful in many cases

Incel shit.

Originated in the same country that invented cereals and crackers to discourage masturbation. Masturbation bad. Pedophilia and rape ok.

Right wing puritan sex-scared propaganda campaign.

Apparently, if you avoid doing a thing for a brief period of time, it is a demonstration of self-control and virtue. Thus, you are a better person and can nut, drink and eat uncontrollably for the entire rest of the year. I don't personally believe in such practices. Do anything whenever you feel like it, but in moderation.

It's all about precious bodily fluids, and the conservation thereof.

Making Thanksgiving really awkward

I think it was mostly an excuse to post jokes, but some people do believe being repressed is a sign of a stronger person. Or that "self care" is bad in some way - most of that comes from the lingering religious shame many were brought up with.

Used to be a joke playing off of "No Shave November" until parts of the internet took it with no irony, just like it always does.

The amount of guesswork in the responses is astounding. NNN came up as cancer awareness, exactly the opposite of what some have commented, because not nutting for prolonged periods is bad for you.

Now, the step-on-me crowd running with it is a different story entirely, it's just what they do.