I assume you're refering to the BTS footage? There's nothing there to support the claim Max told her his was really going to piss and not just fake it, in fact just the opposite: it appears Max did not make this clear. Sorry, but that's what it shows.
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"If they can't picture me with a knife, forcing them to strip in an alley, I don't want any part of it. It's humiliating." - windsock