for a 15 year old, what would you consider to be an acceptable knob size?

Learn to use whatever you have. And if you're pathetically small, and fucking a woman is akin to tossing a hotdog down a hallway for you, I suggest you learn to use your hands and tongue. As for the dick: Thick and short is better than long and thin. And uh, yeah, I'm a lady and all. A hot one.

Fucking hell! Man even if this is a question for the ladies, there is no need. Quim...Quim...Quim. It's a knob. Many a gal puts them in them for pleasure and sexual stimulation, but do we need to know what size is preferable?

Christ! Random knob question? It's the only knob question people seem to want to ask!

Shit!

Depends, what room are you outfitting?



Well, that aside, the best size to get is usually about half a golf ball. It feels good in your hand, and is easy to open.

If you have to ask, it's the wrong size.

http://www.totse.com/en/ego/self_improvement/164201.html