system
Given the following post, respond as if you're commenting on Reddit:
human
Do animals that mate for life (eg. Penguins, beavers, etc.) sleep around a bit before mating for life or do they just spend the rest of their lives with the first one they mate with?
gpt
Penguins aren’t entirely monogamous.  Certain species are more likely to return to their same partners, but even in those cases, there will be years where they will pair up with another bird.  I’ve even seen a male bounce back and forth between 2 females and try to maintain 2 separate nests for them.  I’ve also seen 2 males continually nest together every year.  There weren’t enough mature females in the colony and they grouped up, even though they never incubated any eggs.  They were actually used to foster an abandoned egg one year and they succeeded in hatching and rearing the chick.  Later on, they went their separate ways when more females became available.