I get off more to erotica than porn... is this normal?
There's no such thing as 'normal', but for women to get off on erotica is very common, and it's not uncommon for men as well. I certainly get off on written erotica, and even with my published novels there is always a well-written sex scene or two to add an extra something (although I have many arguments with my editor over this aspect of my writing).
Just for fun I wrote an 70,000 word erotic novel set in Paris in the 1920s, average book-sized. I quite like it, and each of the sex scenes has a different tinge (the opium den, the voyeur room at a brothel, the Paris metro, the swimming pool at the villa, the beach in the south of France). I haven't quite worked out what to do with it, however. One of these days...