There'll be a new anime airing on Japanese TV shortly, titled Qwaser of Stigmata, based on a manga (and yes, it's possible it should be "quasar" instead of "qwaser," but this isn't the important bit). In it, the Qwasers -- part of an Eastern Orthodox school called Saint Mihailov Academy -- a group of powerful people called adepts. It would be your standard dark fantasy series, except that the Qwasers gain their powers through... er, breast milk. Which means they have to nurse. A lot.
...yeah. Now understand that this is an utterly serious fantasy tale, and one that will be airing on TV at that, so it's not just pervert material, although it should go without saying that the mystical ladies who nurse the heroes gain seemingly sexual pleasure from the Quasars' suckling. I would find this horrendously disturbing if it were just some hentai series, but the fact that it's intended for mass audiences makes me want to drink scotch in bed until I black out.
Although when I first saw AnimeVice's headline of "Breast-feeding Manga Gets Anime," I was fairly certain that it was going to be a sports-type series about a girl determined to become the best breast-feeder in Japan. If anyone made it, I'm sure it'll run for at least 42 volumes.