Do you wish that you had a twin for this exact purpose?
.... what about Siamese twins. Do you think that the fact that they're attached to each other raises the probability of them getting curious? Should this be considered masturbation?
BONUS 5th question:
If you are a twin, does this question offend you or arouse you?
Is it possible to pop rice the same way corn is popped? Is there anything else that can be popped? Apple seeds?