Sitting outside and yelling, come fuck me, come fuck me, over and over all day long.
Walking around nude and sitting with your shit all spread out for the World do see.
Animals don't give a *fuck*.
Killing your mate during copulation so his body can nurture you and your babies.
Anglerfish males fuse themselves into females as part of their reproductive cycle, where their existence is reduced into the role as sperm donators. A female can have several males fused into her.
Imagine tiny male zombies biting into the well-endowed bosoms of a giant Kate Upton.
humping random people's legs in public
Sloths occasionally die while pooping
"But I built this structure out of twigs, leaves, and colorful bobbles for you. What more do you need to have sex with me? More blue? YOU WANT YELLOW?"
Satisfying that deep butthole itch by sprawling out and dragging your asshole across the carpet.
[Post that made me think of this] (https://www.reddit.com/r/Awwducational/comments/6zvfkq/female_cuckoo_birds_misdirect_the_attention_of)
It would be super weird just to give birth in someone else's home and just assume the new family would care for the child
Not practiced by all animals, but playing dead. Imagine walking by someone who is frightened by you only to see them suddenly collapse.
Licking people's back hairs, eating bugs out and grooming the back hair of basically a stranger for bonding.
Marking places/things with urine or spray to denote territory/ownership.
Storing up your nuts for the winter.