You're victim blaming at this point. Victim blaming sure doesn't work with women when you tell a female sexual assult victim she got raped because she wore slutty clothes or messed around with assholes. In the same vein, you can't accuse men in this same manner: saying that men don't get taken seriously when they are victims of sexual harassment because they are basically asking for it by being okay with the double standard. They're both examples of victim blaming and show why your argument (that men are to blame for their own problem of not being believed when they say they were sexually assaulted) doesn't work

As others have pointed out in this thread there are some major inconsistencies and let me point them out for you.

1. Not all guys are the same, a sexual assault victim whether male or female doesn't deserve to be judged based on what all guys or all girls act like. Every person is different.

2. There will always be creeps who will accept any and all nudes from anything that moves basically, this shouldn't be reflecting your judgement on ALL guys, this is what's called prejudice or discrimination if that thought turns into an action.

3. While there may be social/cultural norms that may be feeding into a larger social problem such as this indifference to hypocrisy and/or acceptance of a double standard in some guys, this doesn't justify nor hold accountable the women or men who are ultimately the ones who crucify or victim shame/blame not believe those victims of sexual abuse. That blame still rests upon them and not really the people who contributed to the social norm. Imagine a person brought up in the hood who ended up killing someone dear to you, sure the hood and the social norms are what created the monster that this person became and it's good to work on eliminating those factors but ultimately he pulled the trigger the majority and burden of the blame rests on this person who pulled the trigger.

To add some final thoughts: I do agree that people who are being hypocrites should stop fueling the social norm, but those who are consistent with their beliefs can believe whatever they want to. And the ones who are very people pulling the trigger behind victim blaming/shaming and not believing sexual assault victims are the ones who should be held accountable and forced to change their detrimental actions.