The chair salesman gives YOU a stool sample.
A triangle has three points
An ion!
Because they both "practice" their professions.
Hand them a mechanical pencil with the lead out and see how the use it. Child A: look mom I'm a doctor! - expect them to live to 80+ years. Child B: look mom I'm a heroin user! - expect them to live to about 27.
Submitting a stool sample.
Because he needed a stool sample.