Tuned IN, OR Tuned OUT?

Let's face it sex is a major factor in a relationship. It's probably the most important factor outside of fiances. But what do you do when you've been in a relationship for quite sometime, and you NO LONGER have a desire to sleep with your partner? Now there's always ways to spruce up your sex life, but what happens when you no longer feel the need to even satisfy YOUR PARTNER? Sometimes the things you go through in a relationship can have a major impact on your sex life. I know there isn't a man on this earth that can say he's opposed to receiving oral sex, but that's a 2 way street. You have to be in tuned with your partners SEXUAL NEEDS, because if your not the sex will quickly fade, and someone else will be serving it up just the way HE/SHE LIKES IT. I'm just saying, Wouldn't you rather be TUNED IT, THEN TUNED OUT?:)