Actually I figured out a way to make the penis larger in the animations. Open the animation you want the penis to be bigger in, and remember to start off small(so to speak) because even a .1 over and it'll turn into hentai real quick. go through the animation(for example lets use doggie style) go down to every time it says
<CockSizeX>1</CockSizeX>
<CockSizeY>1</CockSizeY>
<CockSizeZ>1</CockSizeZ>
and change the number to maybe a few DECIMAL points higher
ex:
<CockSizeX>1.3</CockSizeX>
<CockSizeY>1.3</CockSizeY>
<CockSizeZ>0.85</CockSizeZ>
it'll become noticeably larger, the reason the <CockSizeZ>0.85</CockSizeZ> is at a 0.85, is because with certain poses tend to pop through the girl's mesh (just my personal choice to avoid visual oddeties, you'll do what you'll do)
After editing every intance of cocksize in an animation save and then try it out, it is a good idea to go through one animation at a time and test(I did it and it can make your eyes wanna bleed)
Hope this helped