you've gotta find where's your G-Spot first... every
different gal has their own individual sensitive spot....
I'm not a girl... but helped a few masturbate before, if you know
what I mean...
No? well there are times you don't feel like doing the actual thing
but you'll just want to arouse your partner, like licking her,
rubbing her clits and fingering her pussy till she comes in the
highest climax... (it'll get more and more crude so I'd better
stop....)
thats how it was done then... don't know if it works here... but so
far I've had lots of luck trying to find the G-spots exactly at the
part where you gals pee.... rub it gently.... give it a try... even
better, get some guy to lick that part for you, but please make
sure its washed.... 
