First of all let me welcome you to the board, 2dreamyangels!
Now, as to your question....
A new couple almost every week, eh? To me that seems like a lot, but what really bothers me is that
you do not seem to be enjoying that pace at all. I'm assuming that he, in turn, has had sex with a different woman almost every week, right? You don't say, but I'm assuming from what you did write that you never see the same couple twice either.
I'm no shrink, but the possibility does occur to me that your husband fits the clinical definition of 'sex addict'. He obsesses over his next 'fix' and from what you've said, keeps a detailed record of the conquests he has made. He also seems to be unable to find anything more than fleeting satisfaction before he moves on to the next woman.
I think y'all have a big problem here, and you have to make the choice about whether to continue to go along with his obsessive ways or stand your ground, tell him how you feel and let the chips fall where they may. To be totally honest, it does not sound like you have much of a relationship at all anymore. There's little communication and he does not seem interested in your needs, only what you can do to get him to his next encounter.
Infofar as whether he needs more than you can give him...well, if you're giving him all you can and he's not responding to your emotional and physical needs, that's his problem, sister, not yours! Don't let him do that to you! I think he may need help and that therapy for the both of you would be a good idea.
That's a lot for me to read into what you've posted, I know, but tell me if I'm right or wrong here.
Best wishes to you! Please, we care here, and I hope you'll be back to continue the conversation.
-B