Have you see the Vagina Monologues? There's a part in it that tries to desensitize women to certain words like c unt. She says if over and over again, loudly, softly, musically, every possible tone of voice. It's pretty funny.
Perhaps it will help you accept yourself and your vagina.
Only losers like you think the c word is funny. Would you still feel that way if the slur was directed at you?