I was wondering what you think "full freedom" in social settings is?
I mean, if they were with a bunch of friends, those friends would probably get annoyed if they started sucking face and being all NRE oozy on everything and everyone.
So I wouldn't feel bad if even later you request that they restrain themselves. Would you want to watch any of your friends grope each other in a group setting?
(Not saying they do these things, just making an example.)