A lot of useful comments and observations here, but I can see where the OP is coming from, as I suspect that he, like me an i suspect many others here, has told these wg's his inner most sexual fantasy's and secrets, after all that is probably why is is visiting them anyhow.
For me, i have told a couple of WG's my inner most sexual thoughts, which of course I would never tell anyone else, and I am sure the OP and the girls have shared some very intimate moments, and perhaps this is colouring his view of them?
I have to admit that telling of such things is similar to a kind of therapy, and I could pay another professional for this, probably as much per session as I pay the WG!