I plan to also do teens and elders, and to take a look at a scripting mod to do adjustments in-game. Some of the combinations of the extremes of these morphs can result in distortion. Issues: The penis has a strange sort of stripy appearance in CAS, but not in the game, or at least not in my game. The sliders can be found in the head/ears general section.
It's UV mapped to use the same textures as the DBCAB penis. It's a default replacement mesh for Adult/YA, with sliders for length, thickness, erection, and testicle size. This is a default replacement penis made using a mesh posted over on SexySims by Rockerduck.