Interesting ... Didn't know JK had an MF ad. Tried him about a year ago thru his more revealing A4A ad:
https://m.adam4adam.com/?section=51&action=delete_trace&profile_id=Thai4u&user_id=9689938
That's definitely him, though assuming the pics are more recent, he's buffed up a bit more. Nice guy, trained but found massage a tad mechanical. Nude. H.E. even more mechanical. Haven't gone back but have thought about a 2nd try.