I have struck up conversations with several - and most are open to or encourage private messaging.
Whether they are gay friendly or not is particular to the person, obviously. If you're new to Reddit, I'll share with you that my experience is that most of these guys are straight, relatively fewer are gay.butbu the common thread is that they all seem to be exhibitionists, some seeking validation. The bolded users are inactive, but their archived photos are still worth looking up. I encourage you to follow these in particular. But some of the guys in the subreddit entitled 'Massivecock' will give you plenty of incentive to sign up.