I wonder from where the word "mult" in the domain name comes from. I might have an idea, but I'm not sure. Anyhow, MultPorn is a porn site with hentai content, adult cartoons, pictures, games, videos, GIFs, funny materials and so on. They have all sorts of happy things and you will have a blast in here.
The homepage has the latest updates and right now I see Samurai Jack, Yoshi, Wendy O. Koopa and so on. Underneath this section, you will see random comics: DC Universe, How to train your dragon, All grown up and so forth and so on. Scroll even more to find pictures for Johnny Test, Golan the Insatiable, Akabur and more. They all have great colors and due to the well built of the layout, it will be easy to access anything you want.
As categories, you will get asian, virgin, mature women, pregnant women, women with huge breasts, anal sex, BDSM, hard sexual intercourse, rape, bondage stories, group sex, double penetration, aliens, bestiality, monsters and demons, tentacles, Fury, futanari, hentai, lolicon, yaoi, shotacon and others. I doubt that there will be something that you are looking for that can't be found on MultPorn. Go!