UGH!! WHY

okay, everyone on here says that an electric toothbrush should work just the same as a vibrator and give the exact same orgasms as a vibrator would. so, i persuaded my mum to buy me an electric toothbrush (with her obvs thinking im gonna use it for my teeth) and it doesnt even give me orgasms as quick as a vibrator would!!! ughhh who else has this problem and has any tips on how or where to move it to? xxx