Beware the Muni Humper

This just in from The Muni Diaries: Be on the lookout for a young, short, "kind of squatty" dude on crowded N-Judah trains who likes to sidle up next to female passengers (or just their shoulders) and hump them like a dog. No word on the hair color or race of the assailant, just that he wears baseball caps and anime t-shirts and is probably not housebroken.