I masturbate with a gamecube controller

Ever since I was young I discovered while playing Smash bros with my brother and he killed me in the game, well the game controller was lying in my lap against my crotch and when I got KO'd in the game, the controller vibrated and it turned me on a lot. After that I went to my bedroom and played with myself.
Now whenever I play video games on the gamcube I make sure that the controller is nicely nestled in my crotch so that when the controller vibrates against my clothed clit, and everytime it happens, sometimes I even orgasm. So is this normal or wha?