Here is my opinion. To simply answer your Q, yes, size does matter. Yet again, size alone can’t guarantee it will do job better. For instant, big but fat (shorter) ones are not always able to induce vaginal orgasm. Having two different partners with different sizes, and taking consideration of only size, sure most gals go with bigger dude. Pinky finger just fits fine in ear but thumb is too big, yet, this big thumb is nothing in relation to mouth. What I am trying to say is that why it’s always about the size of dude? I think, people should also consider the relative size of their partner’s organ too. And about your friend, she should grow up more. What will she do if she encounter with bigger one in the future? No offense here, just curious.