This Page is about one of Penny's ex-boyfriends. If you are looking for other characters with the name "Eric", please see Eric (disambiguation).
In the same episode, when Leslie Winkle is saying good-bye to Leonard after their date, they meet Penny and Eric walking up the stairs, and Penny is explaining Schrödinger's Cat to Eric. Sighting each other, the two couples engage in a competition of kissing (Penny and Leonard).
It is unknown about what happens to Eric after "The Codpiece Topology". In the next episode, "The Barbarian Sublimation" (S02E03), Penny is frustrated and says, "[She hasn't] even had sex in six months", implying Eric might have left Penny and they haven't had sex in their short relationship which is hard to believe.