The "cold, harsh truth" they eventually accept. Iconic Moments & Quotes
Sheldon’s preferred theory, as he finds it more plausible than the final option.
Amy attempts to satisfy her urges by approaching Zack, telling him she is "130 pounds of raging estrogen" longing to "make Shakespeare's metaphorical Beast with Two Backs".
In The Big Bang Theory Season 4, Episode 10, Sheldon and Amy's relationship faces its first biological "crisis." After Amy experiences a physical reaction to Penny's ex-boyfriend Zack, she and Sheldon attempt to diagnose her symptoms with rigorous scientific logic. The "Diagnosis" Breakdown
