Contraceptives

... question, but I think that population growth with humans can be impacted largely by culture. If a society has a culture that encourages the use of contraceptives, and discourages having lots of children, then you'll likely see population growth stabilize.

See entire post

... on dolphins once. It said that the only animals that have sex for fun are humans and dolphins. But, mithril pointed out very well those contraceptives: we do it only for fun and only a few times in our lives to procreate

See entire post

Well, we have contraceptives so we can do it for non-procreational purposes. For any other specie, once they have sex, a baby will likely be produced. Also note sexual behavior is different for k and r species.

See entire post