I think it’s a tad bit disturbing that he thinks he can understand PTSD and trauma by having you “faux-traumatize” him...
....that his mind automatically jumps to this “solution” to understanding over reading books or blogs or watching movies/documentaries or talking to professionals.
Maybe he deserves the benefit of the doubt and is just extremely naive/misguided.
However, I’m not so quick to lean in this direction given that violence is involved.
Most people who truly love someone wouldn’t want any sort of violence anywhere near their partner, they wouldn’t ask a partner to relive the VERY WORST moments of their life.
I hate to say it, but I don’t think this is just one red flag. I think it’s worth about a dozen.
Be sure this guy is actual marriage material before getting hitched.