What you could do slave boi, since your doing this on your own, take either shoe lace or a few rubber bands and bind up your balls together as tight as you like (but must have some pain),once their bound get either a dildo or improvise(i.e. carrot, bananna,zucchini) and oil it up good and slowly shove that in your ass,now to make it hurt a little go sit on a chair grab your balls with one hand and with the other jerk yourself off.... It would help if someone would be doing this to you and bad mouthing you as well. It's more effective but try it out maybe its just as good.
Have fun.
Janine(Misstress)