A long time ago I explained the lift and carry fetish on an old lift and carry site. I also explained why some prefer ff to the other stuff. Years later I have discovered that my theories were spot on, by reading literature on the subject and engaging in discussions with psychologists and sexologists.
In short, it is abnormal to NOT have fetishes. Everyone has them, even those who claim they don't like Michele Bachmann
The only thing is that depending on our fetish we reveal parts of our personalities.