I thought Rand Paul's comments on the Rachel Maddow Show were interesting:

I'm not in favor of any discrimination of any form [of masturbation]. I would never belong to any club that excluded anybody for [getting off in front of other people]. We still do have private clubs in America that can discriminate based on [that].

But I think what's important in this debate is not getting into any specific "gotcha" on this, but asking the question 'What about freedom of speech?' Should we limit [this] from people we find abhorrent. Should we limit [prudes] from speaking. I don't want to be associated with those people, but I also don't want to limit their speech in any way in the sense that we tolerate boorish and uncivilized behavior because that's one of the things that freedom requires is that we allow people to be boorish and uncivilized, but that doesn't mean we approve of it...

Well what it gets into then is if you decide that restaurants are publicly owned and not privately owned, then do you say that you should have the right to bring your [toys] into a restaurant even though the owner of the restaurant says 'well no, we don't want to have [toys] in here' the bar says 'we don't want to have [toys] in here because people might drink and start [interacting] and [blow] each-other [away].' Does the owner of the restaurant own his restaurant? Or does the government own his restaurant? These are important philosophical debates but not a very practical discussion...