Hi there,
I'd say, go with your gut on this one. I find the threats and intimidation to be very off-putting. I've signed dozens if not over a hundred NDAs in business and employment dealings, but I was never, ever forced to sign anything. You could say as much: I'm not comfortable being forced to sign anything. Another way to say this could be: I'll have my lawyer look at it if and when the time comes. If he asks you to name a lawyer, just say you have a trusted cousin, uncle or colleague, something vague. He shouldn't balk at that response because it's customary to have lawyers review any important documents before signature.
But it sounds a little to me like this guy is bragging. He thinks he's so important he needs you to sign an NDA? He's willing to pay you 20 grand to get you to sign it? He's paid past ex-girlfriends to do this? It sounds to me like he's overcompensating for his insecurities, as well as treating girlfriends like commodities to be purchased, coerced and/or discarded.



I previously mentioned some other ideas
line alone would have decided it for me. Threats are a no-no.