interesting topic.. too bad there aren't more women here to answer it.
"Small cock letdown stories"
Reminds me of a broad I was banging back when I was 21 and she was 27. Let's call her Julie. She told me a story about her and a (girl) friend of hers meeting two hot twin guys at a barbeque or some shit. The girls both decide to hook up with the guys. So Julie and a twin find some secluded area and she gets his pants off only to find that he's got a really tiny dick. I guess they screw or something, I forget.
So later that night Julie sees her friend in the bathroom. Julie says, "Hey, I have a question for you....." and the other girl immediately holds up her pinky finger. They both have a big laugh.