Is it normal that i can orgasm by crossing my legs?

Is it normal that I can orgasm by crossing my legs and squeezing them together? I basically just lay down on a bed or couch, cross my legs, and squeeze for a few minutes while watching porn or fantasizing. The squeezing causes a pretty decent orgasm. I first did this when I was in middle school and have continued even through college. Just wondering if other women can do this as well or I'm an exception. Thanks :)