I get what you mean with the phone call, it does kinda... detract from the separation/anonymity angle that makes the voodoo hot. Maybe instead of that... you'd buy some sort of mini-mannequin that you could set up before each day with mini-clothes? Lore-wise, it'd be that putting specific clothes on that mini-mannequin would mentally influence her into wanting to pick that outfit, but only subtly, so it can't be something she wouldn't otherwise consider doing (or something along those lines, you get the idea), which would explain why you couldn't just strip everyone you meet right away. And it would explain why you still have to buy the clothes for them, and not just buy mini versions of the clothes for the mannequin.
I don't think it even needs to be said, but I'm definitely looking forward to the next update of this where you can get some of these features in. Not all of them, I wouldn't expect that right away.
Any ideas on who the next customer is going to be? And how you're going to unlock her? (or are all the customers just going to be randomly pulled-from for the intimate item pool?)