Someone’s excessive sentimentality can trigger a whole spectrum of strong emotions in the interlocutor or observer. From caring, through embarrassment, to anger – depending on the dominant character traits.
Seeing or listening to a person who clearly, physically experiences emotions is something that does not leave us indifferent. We start to wonder what could cause such emotions in us. We try to scale the problem in our less sentimental heads. However, realizing that this is just one way of communicating allows us to maintain a healthy distance from the whole situation.