If you're using a dollar store pregnancy test, you're probably pregnant.

The line is a blunt, comedic observation about human behavior under uncertainty: people often seek the cheapest, lowest-commitment way to confirm a life-changing possibility, especially when they already suspect the outcome. The humor hinges on an implied stereotype—buying a dollar-store pregnancy test suggests urgency, anxiety, or limited resources, and the speaker wryly treats the purchase itself as evidence. Beneath the joke is a comment on denial and confirmation bias: when the stakes are high, even the act of testing can signal that the person has already mentally accepted the likely result.