Managing the hairy palmed

I'm being constantly asked what happens about customers who come in and look at porn sites. I address this by starting with an elementary, and rather bowdlerised, account of the engorgement of erectile tissues with blood caused by visual stimuli enacting hormonal release centres in the brain but it turns out that they want to know whether or not we can bar people. I explain, again, that that's a management issue and they should ask their managers about how the acceptable use policy is to be enacted. As their managers can't tell the difference between an acceptable use policy and a terms and conditions agreement and told me to rewrite the former (written one Sunday afternoon) as it couldn't fit on a one-page A4 terms & conditions sheet in 24 point text I don't think they're on a winner somehow.