if it was a dude and girl, or a dude and a dude. I'll still think it's unnecessary.
It's not a first for the series, the left behind DLC had riley and Ellie kiss. Also, you do know human beings kiss, right? it's not some sort of egregious gesture of love, they aren't fingering each other on stage. I guess if you see it as a form of Public display of affection and you're not comfortable with it, then I see your point.