I also have to add my agreement with the other assessements. One of the major red flags is that nowhere does it appear that this other Dom has mentioned how his current couple partner thinks or feels about the play. That right there (as well as his other comments) says to you "I don't respect subs." Bottom line, he does not deserve to play with you online or in r/l. Along with what others have said here, that's enough said for you to make a firm decision: no play or contact with this type of person.