They live in small family colonies of up to 24 individuals, usually a breeding pair, their offspring, and sometimes an unrelated extra male or two.

Lions live in prides, groups of up to 18 related females and their young, along with up to 9 unrelated males.

Instead, the strongest social bonds are often between unrelated adult males and females.

Panties represent the limit of what an unrelated male is supposed not to see.

Of course, it is inordinately difficult for an unrelated male to converse at all with a woman in India.

When female chimpanzees ovulate, they may mate with every unrelated male in the group, despite the dominant male's attempts to control access.

Females are just as likely to mate with their brothers as with unrelated males of the same age.

Displays of affection or even friendship between unrelated males and females are taboo, including those involving no physical contact.

New colonies are established by unrelated males and females, which become the new breeding pair.

Coalition formation between unrelated males to oust a more dominant male has been observed.