Sheldon and Amy in “The Infestation Hypothesis”

I was hoping she [Penny] might listen to you about the dangers of owning unhygienic furniture.

For general educational purposes or has she acquired a bar stool dipped in cholera?

Cholera is water-borne, you're mocking me.

Yes, I am.

Penny has dragged a chair in off the street whose unknown provenance jeopardizes the health and welfare of every resident of our building.

Sheldon, just because you have a focus on cleanliness bordering on the psychotic doesn't mean I have to participate.

All right. Name your price.

[thinks] Kiss me where I've never been kissed before.

…You mean like Salt Lake City?