Please explain to me how boys do not hear sexist jokes towards men but girls hear sexist jokes towards women.

Matter of scale, as before. For every sexist-to-men joke I've heard as a kid, I've heard more than ten sexist-to-women jokes.

I never claimed that it was but I am sick of this complete denial that sexism towards men is an issue and is arguably as big an issue as sexism towards women.

There's no denial that sexism towards men exists. What is being constantly denied is that it's a valid argument in the debates about sexism towards women. Literally every time someone is discussing sexism towards women there's someone -- to be blunt, someone like you -- who says something along the lines of "But, but, there's sexism towards men, too and it ain't right!"

Yes, there's sexism towards men and no, it's not right, but you're derailing the discussion of a more pressing issue: sexism towards women.

No, it's not "arguably as big an issue as sexism towards women", because of the scale and history. Again, it's something pretty well described in "The Distress of the Privileged".

Yes but Scalzi's metaphor does nothing to explain "why" at all. There is no evidence presented. It just presents a metaphor that explains what he thinks is going on not what causes it or if it even exists in the way he thinks it does. Is there some part of it that I am missing?

Yes, you're missing the part called "required reading". It's just like reading an article about using matrices in 3D graphics: you're expected to know basic arithmetic operations such as adding, subtraction, multiplication, etc.

Scalzi's essay presents a way of explaining a phenomenon that has been described and analyzed in a myriad of other places to which you have easy access.

It could be argued that constantly telling men (and boys) that they have it easier without presenting evidence of specific areas where this is true is sexist as well as damaging to both men and women.

That's like arguing that swimming against the current will necessarily move you upriver, without considering how fast you're swimming and how fast the current is.

People are telling men (and boys) that they have it easier because they're still living in the world where it's normal for them to have it easier without even knowing it.

Yes nobody claimed that it's right to be sexist towards men but no one seems to acknowledge that it even exists on the scale that it does.

That's because the scale on which it exists in the areas of the society we're usually discussing (i.e. tech industry) is nothing compared to the scale on which sexism towards women exists in those same areas.

I agree with you that traditional gender roles that are still being imposed on both men and women are just as sexist towards men as they are towards women. Case in point: in the school, a kid is not considered manly if he doesn't conform to those gender preconceptions (hold your drink, have a pretty girlfriend, be muscular and/or athletic).

I honestly do not know which type of sexism is more prevalent but I feel that that is irrelevant because sexism needs to be seen as a single issue, not as two different issues.

That's tricky. You can "see it" as equally wrong and punish it equally, but that's not all there is to handling and countering sexism.

In order to get rid of sexism you need to do it in a non sexist way otherwise, you are merely shifting sexism from one group to another.

I agree that countering sexism to women by being sexist to men is a case of two wrongs not making a right. What I disagree with is your claim that informing men of prevalence of sexism towards women is sexist in itself. What I also disagree with is the idea that men are being equally harmed by whatever degree of sexism towards them exists currently as women are harmed by the degree of sexism that is currently leveled against them.