Penis/vagina clipping

[Leadrx]

Yeah I know, a lot of you might call me lazy, but I can’t seem to find anything that will make it so the penis doesn’t just phase through the vagina, I would like to be able to see the vagina spread or stretch around the shape of a penis/object.

 

Ive seen pics in the screenshot section but nothing to indicate how it was done. 
 

please, any help would be appreciated.