our attitude toward something has been influenced by the number of times we have been exposed to it in the past. - Robert B. Cialdini

Apparently we have such an automatically positive reaction to compliments that we can fall victim to someone who uses them in an obvious attempt to win our favor.

Parte de su fenomenal éxito se debía a su infatigable capacidad de trabajo y compromiso, pero no todo. Según los cronistas de aquel triunfo, Feldman nunca presionaba para lograr una venta a los potenciales clientes que se mostraban reticentes. En lugar de ello, introducía un toque sutil (y astuto) en su discurso que los guiaba con suavidad hacia esa decisión.

the automatic, fixed-action patterns of these animals work very well the great majority of the time. For example, because only healthy, normal turkey chicks make the peculiar sound of baby turkeys, it makes sense for mother turkeys to respond maternally to that single “cheep-cheep” noise.