well you could use your fingers just to stimulate your prostate a little, that is ultimately what you're trying to do, maximize your orgams by stimulating the prostate directly, for most it would work, but i also wouldn't want to have fingers smelling like ass after I shoot my load.
you can use just about anything...carrots, cucumbers, deodorant bottles, fill a condom with water and freeze it, just be careful on how you insert anything as you could seriously damage yourself if not careful. the last thing you want is to rush yourself to the ER with blood gushing out of your ass and a pickle sticking out.
ahahahaha
E