Erotic Art And Porn

Is there a difference between erotic art and porn?

I think it's a shade of grey. To be considered visual erotica, shouldn't something be pornographic in nature?

I've always thought of erotic art as the burlesque/strip tease of pornography. Erotic art is to Dita Von Teese as pornography is to whatever stripper is featured in a Snoop Dogg video at the moment. But in a way they're still linked. Or even better example: Erotic art is to Playboy as pornography is to Hustler.

Perhaps I should have added this question to the previous one about mood music. This is one tiny ass post, sorry I don't have much to say on the subject.