Song parody mastermind Psych stopped by to sing Robin the 100th song he'd written about her, and Howard was shocked at how little new about the ass-obsessed songwriter: "Who knew you were blind?" Psych laughed ("I knew!") that he lost his sight to tumors when he was a toddler--a disability that's robbed him of this world's greatest privilege: "I've never seen Robin." Psych then whipped out a mammary-emblazoned guitar and sang 'Let's F' Tonight' to the tune of KC & the Sunshine Band's 'Get Down Tonight', 'Party in the Tush Today' to the tune of Miley Cyrus's 'Party in the USA' and an anal sex-themed version of Rock Mafia's 'Big Big Bang.' Before leaving, Psych handed Robin a CD of all 100 songs: "If one day you're just walking around doing something and want to hear 'How Deep is Your Butt'."