i can not agree more, sub frenzy is not uncommon, the mind is a powerful thing and when captivated so it can control ones thoughts and make people act and do things that in the cold light of day they would never entertain doing.
Please please be very careful, Ds relationships are based upon trust and understanding, as with Dens post alarm bells are ringing for me if he is unwilling to tell you anything about him, trust is earned and mutual. I myself would be very uneasy if my Domme or sub was unwilling to be open.
With out openness i would be very cautious, think through your actions, and try to remain calm and rational, and if i were you get him to tell you more about him, as i said trust is essential in Ds partnerships, far more so than in vanilla.
Maybe tell him of your concerns and see if he looks to address your concerns by opening up to you, if he does not, then be very careful.
Good luck, and i hope all goes well, but as den says stay safe please.