As far as 'apprehension' vs. 'anticipation' goes, that is more along the lines of what I meant.

Anticipation lets me know what is coming up. This, unfortunately, for me, ends up being more of a turn-off. What if I'm not in the mood for it? What if I'm too tired to deal with it? What if my responses aren't sufficient to turn him on?

Apprehension, however, is always a total turn-on! I'm the type that loves horror movies, for example. The sudden surprises in them seem to get my adreneline flowing. I love to be shocked and surprised....the 'newness' of something happening. Without the time to feel or think myself into a negative response. I seem to need the spontaneity in order to get a thrill.

Hmmmm, my partner must realize this to some degree, as he almost always makes me wear a blindfold.