There seems to be a bit of a gray area for the rating of partial male nudity.
For instance, notice this image, in which the character's crotch is pretty distinctive:
post #415505
It's rated safe. However, this one, in which the bulge is less noticeable, is rated questionable:
post #330645
(edit: these have now been changed)
I couldn't find any official word on this. What's the policy? Should their ratings be switched, or should both be safe/questionable?
There seems to be a lot of overlap between bulge rating:q and bulge rating:s.
Updated by NotMeNotYou