Answer to Question 1
Behavioral reinforcement theory suggests that we like people we associate with feeling good and love people if the association is very good. Love develops through a series of mutually reinforcing activities.
Answer to Question 2
In a famous experiment, Schachter and Singer (1962) gave students a shot of epinephrine (adrenaline), which causes general arousal, including sweaty palms, increased heart rate, increased breathing, and so on. Some of the students were informed of what to expect from the epinephrine; others were not.
Each group was put into a waiting room with a student who was acting happy or a student who was acting angry. When they felt aroused, the informed students assumed they were feeling the effects of the epinephrine. However, the uninformed students tended to believe they were feeling happy or angry. Schachter and Singer concluded that an emotion happens when there is general physiological arousal for whatever reason and a label is attached to itand that label might be any emotion.
