I KNOW i made a post here somewhere about Bumblebee/Knock Out/Smokescreen and how it could happen but I cannot find it for the life of me.
But anyways I have refined the idea a bit more. And made it a bit funnier.
The three of them are still chilling at Smokescreen and Bee's place, drinking and just shooting the breeze (and possibly bitching about KO's failing love life and trying to be supportive friends). When Bee plants a lil affectionate kiss on Smokescreen for, whatever reason (the why doesn't really matter, they are conjunxed after all). And Knock Out, jokingly goes 'what, no kiss for me?'
And to be clear, it was a joke (mostly). He didn't expect Bee to do anything aside from laugh.
So he, and Smokescreen, are very caught off guard when Bee is like 'you're right, how could I leave you out!' and leans over and plants one right on him before anyone can stop him.
Needles to say, Smokescreen and Knock Out are like 'Bee WHAT?' and KO is very flustered b/c, well, he sure didn't expect his friend to just lay one on him like that.
And Bee, trying to salvage the situation is like 'you're right, I can't believe this isn't fair to Smokescreen' and decides that obviously the best way to make it fair and even is for KO to get a kiss from Smokescreen. They are trying to insist that no they don't need to. They fail to convince him otherwise so KO just like, drawls across Bee's lap to get to Smokescreen like 'let's just get it over with. pucker up big guy'
And it is not awful at all.
And ultimately ends w/ all three of them getting VERY smoochy and hands-on with each other and is the gateway to all of these morons realizing they have feelings for each other (well, more specifically Bee and Smoke realizing they might like KO as more than just a friend and KO having to finally confront his deeply harboured crushes on both of them)