there is soo many theoretical posibilites the answer would be hard to speculate.
Originally Posted by JustMeCLTXGG
Agree with this and what everyone else is saying.
There are so many possibilities, be them physical, emotional, etc.
She could have her own issues stemming from physical problems or insecurities, or emotional issues concerning sex (bad childhood, abuse, etc etc etc).
She could just be mad at him for other reasons we do not know. Yes, he is your friend, but as they say, there are always three sides to the story: his side, her side, and the truth. So, they could have other marital/relationship issues that make her no longer wish to be intimate with him.
I agree that it definitely sounds like an excuse on her part. A very good example I have, is a personal one. I was in a relationship with a man for 8 years who was an emotional abuser and manipulator. In the beginning of the relationship, our sex life was amazing, and explosive, he couldn't keep his hands off me, etc etc etc. By the end, he had pretty much stopped having sex with me altogether, and every time I would try and discuss it with him, he would tell me similar things to this" it was him, "not me", he was feeling unsexual and insecure, etc etc. The truth was that he was fucking numerous women behind my back and using isolation of sex and affection as a way to abuse and control me.
So, it could even stem from something like this, and she is just lying to him.
The truth is, very few people in this world hate sex, because hey, it's sex and it is awesome!!!
So, am sure it is some other underlying issue causing this behavior.