I mean, to put stuff in context:
First off, he didn't post any pictures of Kristin/Bubbagum when she was 16. He did get a picture of her in underwear, but it was because he got her them as a gift (probably upon request). Tenshi was the one who posted it. Also, she was sixteen approximately two years ago, which means Nick was about 18. A two year age gap isn't anything ridiculous, and it's pretty socially acceptable for an 18 year old to be with a 16 year old. Yeah, Tenshi shouldn't have gotten his hands on the picture in the first place, but it was still his decision to post it to the world, not Nick's.
Secondly, by "researchographic photos of himself," KickFlow means pictures of Nick's ass. I wouldn't consider a man's ass research, but I'm not really here to debate that. Also: that girl uses the term 'loveting' to mean suggestive chatting. Here's proof:
Also, that was Tuesday, and this topic was posted today, Friday, so in-picture-verification it's the same girl.
Furthermore, that girl told everyone she was 19. She just flat out did. We only found out that she was 15 within the last week, so totally not his fault.
Anyway, regardless, this boils down to him receiving a picture of a 16 year old in underwear at 18 and sending a picture of his hairy ass to a 15 year old. Not really creepphillic imo, but take it as you will.
