You can take this insight for what its worth, but I am often very sensitive (jumpy, tickelish) when being touched. If I am certain that my H was touching me with no expectation of sex behind the touching, I can relax into it and become aroused. If I know that he is expecting his touching to go beyond pleasing me tactically, I get jumpy/ticklish. It is not something I can control any more than I could control a facial tic or a hiccough. I have told H this and when he does make the effort, he has been rewarded with a hot tryst. It is not repulsion I feel, but frustration that sexual touch initially gives rise of these responses in me. It would be much more (mutually) satisfying that I be able to respond more readily.
I don't mind the sun sometime
The images it shows
I can taste you on my lips
And smell you in my clothes
Cinnamon and Sugar
And softly spoken lies
You never know just how you look
Through someone elses eyes
BHS-"Pepper"