This appearance marks the final appearance (so far) of Aarti Mann as Priya.
Mayim Bialik is absent from this episode for some reason.
The title refers to Leonard's fluctuation over cheating on Priya with an attractive new girl he meets.
Penny: Leonard, you're looking for a way to sleep with both women and have everybody be happy about it.
Leonard: Now we're getting somewhere.
Penny: What does your gut tell you to do?
Leonard: Go ask Penny. She'll know what to do.