I just use the open and close morphs for the main penetration, and I dont replace his dick, Ill explain more -
I set the couple up in the fuck pose, I wont worry about where the dick is in relation to the pussy, as long as its in the generally area of the pussy. I then hide the male and insert the cylinder (tube) like a dildo, I got the idea from a dildo, and make sure I get fitting snugly in the pussy at the right angle.
I then hide the female leaving the cylinder where it is and then unhide the male, so you have the male and a cylinder, I then position the male and his cock into the same position and angle as the cylinder (the cylinder needs to be the same girth as the dick.)
