There's an awareness campaign for testicular and prostate cancer involving guys putting socks on their penises (hence, #cockinasock a la the guys of Red Hot Chili Peppers),
taking a (almost-naked like wee baby) selfie and posting the pic on any/all of the holy trinity of photo-sharing social media (you know, le T.I.F.).
Since it's graduation season, it is in order to give this charity-should-be-fun movement the following citations:
Best Hashtag
and Best Awareness Campaign to exist in the history of hashtags and awareness campaigns.