Girls masturbate just as often as guys do. Sure, it might not be the same for women who are getting older and their hormones are going in the opposite direction, but young women cannot go to sleep without a good orgasm, just the same as you.
The main difference between the sexes is that women can go online and masturbate with a webcam and have guys pay them to watch. There are a select few group of dudes who can pull this off with women, but mostly they end up with 95% gay guys in their chat rooms. For me that would be a hardon killer. But to each his own.
This Latin Cutie stuck a vibrator up her pussy and then pulled some panties on to keep it in while she talked to the guys in the room. It is an amazing site to see live. She is on almost on a daily basis in the middle of the night.
If she is offline you can find hundreds more Latin babes here.