Q: Is friendship a relationship of mutual affection between people? ¶
A: Yes.
Q: Was friendship associated with higher adult self-esteem? ¶
A: Yes.
Q: Are friendships happier? ¶
A: Yes, although the absolute number of friends did not increase happiness.
Q: Is friendship replaced with another close relationship? ¶
A: Yes.
Q: Are friendships common between humans and domestic animals? ¶
A: Yes.
Q: Is friendship also found among animals of higher intelligence? ¶
A: Yes, such as higher mammals and some birds.
Q: Is friendship a stronger form of interpersonal bond than an association? ¶
A: Yes.