I prefer to stay away from drawing sex stuff because it's less interesting to me, in the same way that I draw a lot less nudity then I do clothed and partially obscured. To me it's like getting a present, only someone has already ripped off all the wrapping, torn open the box and played with the toy inside.
...actually that sounds almost as bad as the real thing... ^^;
Anyways, to answer the question, I am not afraid of sex. It's afraid of me.