Whenever I go down on my girlfriend it always comes to a point where it gets too ticklish and she has to push my head away. She is overly sensitive down there. Apparently its been really hard for people to make her orgasm through oral. Her last serious boyfriend could only make her orgasm twice with oral for the entire duration of their relationship which lasted upwards to a year.

She's sort of bisexual and used to date a girl for a couple of months and that girl made her orgasm about 5 times or so. I'm at the 3 month mark and have made her orgasm with my tongue ZERO times. The sex is great, 3 out 4 she will orgasm but I still can't get her to orgasm with my tongue. Its kind of a blow to my ego since I could make my past girlfriends orgasm from oral in no time. I've been trying my best but I'm still at a loss, though I have discovered that I get better results using a very flat tongue and inverting my head. I really want to please her orally, do I need take drastic measures and find sometype of herbal remedy to numb her clitoris so the tickleshness goes away? Help!