Such a Simple solution to this....

Ask him to take a selfie holding some random object like a toothbrush or a roll of toilet paper whatever ...but something YOU request.... If he does then at least you will know for sure what he looks like... If he doesnt or gives you a run around ,,well then DUH it's going to be obvious... I personally think this is a very unhealthy mess.

Furthermore.. Im sorry that whole going to prostitutes and his reasons for it would have had me blocking him on all possible sources long long ago.

I think hes probably some 50 year old man or woman living in moms basement.. I can lower my voice enough to sound like a man, so who knows who left you a message.

Just your post about him stalking you and now this one? your basically defending and justifying his actions

Stay safe is I guess the only possibly useful advice I can offer.