Glad to see a bit of traction and input with this thread - I'll add onto it, as I've stumbled on quite a few videos I'd like sourced please!
I'll start off with this compilation video, very short clips so I figured I'd timestamp each one I'm looking for, so as to not flood this post with gifs/images:
(0:04 - 0:06, Two guys touching dicks)
(0:13 - 0:18, Guy sucking on balls)
(0:21 - 0:22, Two guys in gym singlets)
(0:26 - 0:28, Guy drops towel in locker room)
(0:29 - 0:33, Guy playing with the head)
(0:34 - 0:35, Guy showering)
(0:48 - 0:51, Camera pans down to well-hung guy)
(0:52 - 0:54, Guy smacking his dick around)
(0:54 - 0:55, Guy sucking off big dick - have been searching for this one for ages to no avail!)
(1:06 - 1:08, Teasing dick around guy's mouth)
(1:21 - 1:23, Sucking dick in the locker room)
(1:26 - 1:30, 3 guys touching dicks)
(1:30 - 1:31, Below view of throbbing dick)
(1:32 - 1:36, Hairy guy in white underwear)
Any help is appreciated (compliments on my superb description of these clips are welcome).