Monogamy is a relationship with only one partner at a time, rather than multiple partners. But even if they want to be with just one partner, some people have trouble staying monogamous.

Is human monogamous?

As time passed, primates as a whole became more social and evolved to live together in groups, but only humans became truly monogamous. Today, other primate species such as bonobos and chimps mate with multiple individuals in their groups.