I won't trust anything HBO put on the screen, they are truly the (unwanted) pioneer on how to digitally plant or alter genitals on actors' body, and its success on shows like "tell me you love me" set the standard for Hollywood, other studios soon followed and everyone started to use digital effects the spread of digital nudity ruined everything, real, fake, real but digitally stitched... no one knows,
and that's why we now find ourselves constantly question it's real or not, the guess work killed the excitement of seeing nudity on screen, it's no longer "wow he is naked!", our first reaction has become "is that real"? maybe it's real, or maybe not but I don't have the fuckin time to do the detective work, so the end is I give up on HBO and Hollywood.
For male nudity, I only trust works from other countries especially from Europe France, Germany and Spain...