I fucking love pictures like this. Where you can see a guy’s cock cage poking through his underwear. Preferably jock briefs or “gay” underwear:
The first shot above, of the chastity device visible under the Under Armour, is from Denying Thumper, whose site is filled with helpful information about chastity. Also TiedFeetGuy is pictured above.
This post has some “device through stretchy fabric” pics, too:
http://denyingthumper.com/2014/10/12/running-man-continued/