Season 5- Episode 19: Young Sheldon -

“Technically, it’s a thermally optimized quadrant. And Billy Sparks once ate glue paste for an entire semester. His social credibility is null.”

“What happened now, honey?”

Missy walks in. She looks at Sheldon. She looks at Mary’s worried face. Then she reaches into her pocket. Young Sheldon - Season 5- Episode 19

Sheldon gasps. “You touched it with your unwashed hands ? The oils alone—” “Technically, it’s a thermally optimized quadrant