How can one usually determine another person's mood or feelings?

Determining another person's mood or feelings can often be effectively done through their facial expressions. Facial expressions are powerful indicators of emotions; they can convey a wide range of feelings such as happiness, sadness, anger, surprise, and confusion without the need for verbal communication. The nuances in a person's facial features—such as the position of the eyebrows, the shape of the mouth, or the openness of the eyes—can provide immediate insight into their emotional state.

While voice tone, choice of words, and gestures can also contribute to understanding someone’s feelings, facial expressions typically offer the most direct and immediately recognizable cues. This is particularly relevant in interactions where verbal communication may be limited or non-verbal cues play a crucial role, such as in beauty and cosmetology settings where expressions can convey satisfaction, surprise, or discomfort regarding services provided.