Very publicly in love

And why shouldn't they?  
It is so much nicer to be publicly in love, than to murder each other very publicly on the streets of Baghdad, Bali, Beirut, Bogota, Boston, Inverness, Kabul, Kinshasa, Paris, Sao Paulo and anywhere else that sees people compelled to kill each other. For religion, for money, for drugs, for fun. 
Because it is easy. 

Ok, maybe not Inverness.