Big Bang Theory: The 5 real-life relationships away from.
Here's why Penny (Kaley Cuoco) dated Stuart (Kevin Sussman) in The Big Bang Theory season 2. Known for her active dating life at the beginning of the sitcom, Penny has gone out quite a lot. It was clear that she had a type before she got together Leonard (Johnny Galecki), which is why their relationship was played out as an anomaly on the CBS show. However, she had a much weirder dalliance.