Michael Fassbender seems to confirm in an interview that the kiss scene was a "joke"

"Making fun of gay people, maybe?"

Reaching.

Yet, the kiss scene was put in the movie at the expense of other scenes which could've developed the environment of Paradise more.  To me, it's important because a kiss is usually means something serious, yet it does depends on culture too.  Regardless of what Fassbender thinks, I'm sure Ridley Scotts vision was the deciding point of that scene.  If it was such a joke, then why put it in such a serious movie?

The scene, while most likely being a reference to Blade Runner, was essential on two fronts, one to throw Walter off and two to showcase David's increasing sexual frustration as he is unable to "feel" but clearly does like Ash in Alien79. Fassbender clearly doesn't think much of it because it's work and it's not a big deal to have two men kiss. Obviously people were going to have fun with it as it was probably intentional as Ridley likes to have humour in his works but that doesn't mean it wasn't meant to be taken seriously either. 

Well, it seems that Fassbender is just doubling down on the comments that him and Scott have given before. Those comments were along the lines of. "It's okay to laugh, not everything in this film is super duper dead serious." 

I do agree with Lawrence of Arabia and I Moon Girl that it means  something(s). I mean, to be included in the movie, especailly at that point, it HAS to. Otherwise it would just be a reall really bad choice. 

Lawrence of Arabia The kiss on the lips scene was excelent in the original Blade Runner movie as it was a communion/send off between creator and creature. But now it turns out it also applies to "brother" synths and inter species send offs, as proven by The AC kiss and two other very prominent kisses on the lips in "Blade Runner" 2049". I loved that movie but those kisses were uncalled for in my opinion. Kisses on the lips in a movie directed or produced by Ridley Scott are actually becoming a "joke" in a way.

 I find it kinda puzzling that he says "I don't think it's something that needs to be respected and revered and taken seriously". It sounds a little bit that he is taking distance from it. As if he was saying: "Dude, I am a professional; this is just my job. I don't want you to make me the poster boy for misunderstood gay folks". Oooops maybe he was reading some of the posts on this forum.

'What he says kinda confirms that this was probably a "private joke" improvised on the set.'

joylitt seems to confirm in a thread that the username joylitt is probably a 'private joke'. :D

No, Ati, they are not laughing with you. They are laughing at you.

Ati Just in case,  I wouldn't send any Tom Of Finland inspired sketches to Michael Fassbender. He might not like them.

joylitt -  'I wouldn't send any Tom Of Finland inspired sketches to Michael Fassbender. He might not like them.'

OK joylitt, in this way your Tom Of Finland sketch collection will remain as a whole. :D

Ati Exactly. At least I embrace it wholeheartedly.

joylitt - 'they are not laughing with you. They are laughing at you.'

If it makes them happy... :D

I dont know what to make of this....

Surely it cant had just been a spur of the moment joke?

It appeared to me to be a Nod/Easter Egg to Blade Runner, and also it could be seen in a number of ways, in which to me it was kind of a Judas Kiss

I know some interpreted it as a Gay Kiss and David was thus a Bisexually confused Sex Crazed Robot... but i dont really buy into that.  Well maybe kind of lol

I think that scene was both interesting when Walter and David discussed things because you could see the differences between their worldviews but at the same time it was so slow so it became a bit boring. They could have made that in some other way that wasn't so slow.