I know that this is a ridiculously picky pet peeve of mine, but I am always annoyed when I read an erotic story in which a woman has a "waste", as in her lovers arms were wrapped around her "waste". The correct word here is waist. Spellcheckers are great, but they can't tell you that you've spelled the wrong word correctly.
I also see a lot of "your" for "you're" and "their" for "they're".
I also see a lot of "your" for "you're" and "their" for "they're".