After a sexual encounter that results in Penny's bed breaking, Penny and Leonard end up sleeping in Leonard's room, much to Sheldon's dismay. Penny then makes French Toast for breakfast, which does not meet Sheldon's weekly schedule (it's oatmeal day).
During the episode, Sheldon tries to improve Penny using chocolate, rewarding her for what he considers to be correct behavior, as in operant conditioning with lab rats, despite Leonard's opposition.
Howard and Raj go out to a goth club and meet two girls. After they say they would prefer to go "somewhere else and have some fun" the four end up in a tattoo shop, which makes Raj and Howard reveal their true selves and admit to not being goths, missing their opportunity with the girls rather than having tattoos.
Leonard, Sheldon, and Penny are watching the anime Oshikuru: Demon Samurai, which is a reference to a 2004 episode of Two and a Half Men ("The Salmon Under My Sweater") in which Charlie and Jake collaborate on the theme song to the same show. Both series are created by Chuck Lorre.
The title refers to Howard going to the goth club, and it mixes the two words "Goth" and "Wolowitz".
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