What are you talking about? It’s obviously a prosthesis. It’s a realistic looking cock sleeve, and he’s hard (viagra) under it and probably anchored to balls so it’s fairly well supported. However, it’s still easy to tell:

1) Filmed at angle so you don’t see the base

2) When he holds his dick he actually holds it in the middle of his real dick, not in the middle of the sleeve

3) Stops supporting the dick only when it’s inside her

4) The dick looks fully engorged but somehow is not hard?

5) It looks realistic but there’s no movement of skin on top of it. It’s one solid (silicon) body. It’s not immediately because he appears to be circumcised but even circumcised dicks have fairly mobile skin.

6) Random sleeve video: https://www.pornhub.com/view_video.php?viewkey=ph5833e67628cb2 Exactly the same holding method and wobbliness.

Blacked is basically a fetish website. Their entire business is faking this shit.