Originally posted by soyelmocano
Work the middle part.
Work it in and out of some girl. Think about it. Not only do you have friction, but you've got variance in girth. Head, then thinner, then stretched wide, then thinner. Then the same on the way out - going from thinner to stretched wide to thinner to head. Have you noticed that several toys for the ladies are designed with various ridges or bulges?
Point is - don't worry. Just try to make it all bigger. If the middle gets even bigger also, so what?