I checked the community rules, just to be sure, and there is no rule against male posts. But every time a man posts an image, it is immediately downvoted.
I understand that some people might not be interested in seeing that, (I’m more of a boobs guy myself) but there are gender tags on every post. It shouldn’t be a surprise when you click on a post with an [M] in the title and see a cock n balls.
Feel free to avoid the penises if you aren’t interested, but why discourage the guys who are willing to share with people who are interested in seeing that?
That’s the way our instance works. Lemmy.world has downvotes (also in the lemmynsfw communities), lemmynsfw doesn’t.