What really turns you ON in the real world?

Movies and television have a very narrow view of what's sexy.  Real life doesn't always follow their script.  I often wonder what really turns a person on.  What is it that flips your switch?  Not just the seeing that hottie naked type thing but the, I really have a thing for him/her and when he/she does  (  ???  ) it drives me wild.   I'm looking for a wide variety of views on real life turn-on's for my next book.  Come on and help a writer out with a little insight.  I'll even start out with my own just to get the ball rolling.

Personally, I'm an arm girl myself.  Seeing a man with real muscles (not just gym made ones) flex as he's picking up that heavy whatever gets my motor revving.   They don't need to be over developed just nice and strong and pop a little when he's flexing.  

What causes you to not finish reading a book?

I was recently asked this and it really made me thing about how to apply the information to my writing. 

So, I ask you, what frustrates you the most when you read and how bad does it have to be for you to quit the book?