I'm sure you could just rub the outside, I'm sure it would still cause the muscle to react.

So what you are saying is the muscle on the outside or the G-SPOT on the inside needs to react? Thanks for your feedback Sdawnk. But I am still some what curious?

From what I understand the muscles will atrophy (become weak) if not used.  The muscles are the pelvic floor muscles, you can keep them working by doing Keigle excercises, you can learn to do them by stopping and starting the flow of urine, this will show you you are using the correct muscles, then you can excercise them anytime.  The stronger those muscles are the better your orgasms will be.  If you are acheiving orgasms, then you are also excercising this muscle, so yes toys are fine.  I hope that helps.

THANK YOU SLEEPTECH, ALL MY GIRLFRIENDS WERE WANTING TO KNOW AS WELL. SOMETIMES I FEEL IM NOT USING THIS SITE TO WELL. ONCE AGAIN THANK YOU FOR THE COMMENT.

                                                                              JANET