The lecturer's pickup game

A man with a bald head and a blue collared shirt displays a range of expressions, starting with a subtle smile, then widening into a manic grin with his eyes opening wide, before returning to a broad, toothy smile. The sequence alternates with a woman with dark hair, who looks down with a serious expression, then slowly lifts her gaze and smirks slightly. The setting is a dimly lit, dark environment.