This is about as many issues as you can attribute directly or indirectly to societal growth and maturity. There are behaviors that are harmless or simple safe biological expressions that led to murder or assault by homophobes or followers of dogma. The more we rid society of man made evils and prejudice, the better.

Think of all the times when you were a boy and you heard or saw some kid getting beaten or called a faggot when he probably didn't even know what it meant. The fewer ways we have to arbitrarily hate other people the better.

This decision is another small step for man.