arguing or debating here

You dont know him, you have never seen him, he does online dating, you have no idea who he is.

I know him!
Who said I haven’t?!
Many people do online dating and find truest of love that way and fall into marriage.
I have every idea of he is.
Anything else
yes, but if he were a well disguised cereal killer (Which he probably isn't, just making a point) how would you find out?