I like Leary, but I've never watched this show... I believe I get spoiled by HBO's shows and have too short of an attention span to watch a TV show with commercials.
It's on FX because the content and graphic nature keeps it off the main cable networks. I think that's why FX shows are so good (i.e Nip/Tuck, The Shield, Rescue Me)..... because they can push the envelope and do just about anything they want.