agree with the post above..
also take it from serious to not so much asap....but add your subliminals.. like
what Atila said... "whoa whoa.. i thought you felt like it was YOU that deserved it actually...haha.. all i care about is that we always have fun and we are comfortable. from monkey sex to scrabble.. so whatev happens happens.. no biggie k? come on now, you know me... it takes a porche and chocolate ice cream before i fall in love

"
that difuses... keeps the idea that sex could happen and she wont HURT you because youre not emotionally invested so she can not feel bad about it and also if she feels like she doesnt want to do it when it comes down to it.. you wont care... so she can just say no... cuz whatever happens happens... one way or another.....next time you pick her up and she gets in ur car.... grab a scrabble game if you have one and set it on her lap and say "you know.. jsut case we dont have sex" ... and smile...