HI!
I get it now...You know, I never use the default dong when doing handjobs, footjobs, titjobs, thigjobs, etc. it is very difficult (to me) to get all things in place, instead I use the hooh items: A scripted dick, first I activate the dong in the male actor, then place the scripted dick atop the dong, using it as a template, then deactivate the default dick.
second, Set all animation to zero, use a piston gimmick, placing the piston in the way the hand, tits, mouth (head) etc, will move, once in place (and also sometimes you have to adjust the scale, cuz pistons too large will make animation large and may clip between bodies)
after that, i add a Dick navigator, when the dick navigator is in scene, the dick will move towards it, so I try to place that navigator as close as the tip of the dong is (use the cross in studio, then add the item, it will be added in the cross place)
Once all in place, I proceed to parent the items with the coresponding bodypart: piston/dong/dick navigator/hand
Finaly I use Node Constrains to "glue" the items: set the piston as parent, and the hand as a child, so, the piston will move and the hand will follow that move, the hand will move the dick nav and the animation works good, last I fine-tune what has to be fine tuned and voilà. take a look:
As for the dick with no color, you have to set the desired color in the sliders, sellect the dick, next select the top left tab name "anim", there will be 3 colors, the first one is for the tip, the second one is for the shaft, modify ONLY the gray scale (40-70 is good)
There you have your scene file, mified by me, hope that is what are looking for