Why...
... this one can be kept secret!
https://www.youtube.com/watch?v=VTUrdizRZyw
>2013 (or thereabouts)
>16 young men (or thereabouts)
>in Brooklyn earning bachelor's
>discover unsavoury graffiti in a stairwell
>pictogram depicts a penis like tuber forcing another penis back out a vagina
>caption reads "Riding The Magic School Bus"