Re: subtle comments?

it can be one of two things.

either she really doesn't like the sex and you have to ask her to show you how to make it better or study some sex programs or books.  or...

she is insecure and looking to hear reaffirming things from you to make her feel like you love her and won't leave her.  some people always do this and cannot stop. it is called sabataging a relationship.  some people grow out of it, as it is part of being young, and some don't and need counseling.