Mark Zuckerberg Has Yet to Retire His 'F— You' Sandals, to Girlfriend's Dismay 31.46K Maureen O'Connor 10/11/10 10:42AM Filed to: open caption open caption Mark Zuckerberg Priscilla Chan Pcn Valleywag [Mark Zuckerberg and girlfriend Priscilla Chan stroll near the Facebook founder's home in Palo Alto. Image via Pacific Coast News.]