The next time you're in Target, you can ask one of the sales girls... They sell that dual prongy one in store.
Well, then,
Target is an appropriate name for the store.
Seriously?
Generally the large one goes in the vagina and the small one just vibes on the clit.
Yes, I know that but they are also duel purpose as sometimes they will place the small prong in the naughtiest place. Everything lines up - just sayin'
..I just can't believe anybody responded to that