Will we get heckled if we kiss at the Ara Pacis?

How gay-friendly are Rome, Naples, and Capua? My same-sex partner and I will be visiting family near Capua soon. We're both Americans who grew up in the upper Midwest, where the advisability of kissing in public changes wildly from township to township. We're planning on doing some touristy stuff in Rome, where we'll be getting a hotel - can we expect the hotel staff to not be weird about us wanting one bed? More generally, what can we expect in Rome, Naples, and Capua?

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