Re: two flaps?
Are you talking about your clitoris? Your cervix is all the way back in your vagina, and usually it's hit it a penis goes in deep. If you're talking about something that has two flap around it (the labia) then don't you mean the clitoris and not the cervix?
If it is the cervix, he shouldn't be touching it that much, for some girls it hurts a lot, I've also heard that some instantely orgasm, but for me it hurts. My boyfriend has never been able to reach my cervix just from fingering though.