I'm looking for some really graphic stuff. Nothing cutesy, though, please. I'm interested in rape, bondage, and huge penises. Weird? Eh.
Stuff like [http://www.mangaupdates.com/series.html?id=64087] especially. Please help me out! I've read quite a few, so just throw some out there.

It's not weird to like these kind of things! tbh, i havent read many titles with themes like these, except for maybe Creampie , but...
You could try anything by [a]Gengorou Tagame[/a].
Here's some manga under the categories "bara" and "rape": http://www.mangaupdates.com/series.html?category=Rape_Bara_& perpage=50
And with the genre yaoi and "BDSM" as a category, you could try some of the titles here: http://www.mangaupdates.com/series.html?category=_BDSM__& genre=Yaoi&perpage=50
Some of them might not be what you're looking for. You could also try other works by Mentaiko like "Lowest Common Denominator" or the "Itai Itai Itai" series.
Anyway, hope this helps.

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Thank you so much! This is perfect