I personally cringe at any public display of affection (well holding hands is OK, but that's about it) unless of course it's somewhere like on the beach or in a park...that's excusable, still there's a limit.

That's the advantage of studying the physical sciences you become aware of the fact that neat theories have
practical limits,that have to be taken into account whether you like them or not!

The World is my country, all mankind are my brethren, and to do good is my religion.
Thomas Paine
Facts do not cease to exist because they are ignored !- Aldous Huxley