Heterosexual attraction is because of racial reproduction, same-sex attraction is love?
The scientists observed same-sex sexual behavior from more than 1,500 species and fully documented same-sex sexual behavior in 500 of them, finding that there were not only short-term sexual relationships, but also long-term partnerships.
For example, the American bison, the bulls only wait for the mating period to mate with the cow once a year, the rest of the time, generally play with other bulls. There are also grey geese, often two male grey geese "a pair of birds in a lifetime", from one to the end, especially in love.
Curious friends may wonder how animals decide who to attack during the mating process.
Hermaphroditism, that is, a phenomenon in which both female and male traits are evident in an organism. Hermaphrodites are when an animal has both sexy glands.
How do hermaphrodites reproduce?
For example, there is a small fish that lives in the tropics, called the black grouper.
Every day an hour or two before sunset, they begin to heat up, swimming around the reef in search of objects. Once found, they will start to take turns playing the role of female and male, this time I excrete sperm, then then I will release eggs, through ivory fertilization to breed, no scrambling, no quarrel, especially harmonious.
The slug, commonly known as the slug, is a mollusk that looks like a shellless snail and has a pneumoposary with some snails.
slugs
When mating, the slugs will first find another slug, make an appointment to go to the tree together, and then secrete mucus together, and then wrap the body together.
Just when this life is hanging in the balance, the two slugs will show their male genitalia and then touch the tips together to exchange each other's semen. Through in vitro fertilization, the great harmony of life is achieved.
Algae sea slugs/sea sheep - pocket lambs
Sea slugs are not slugs, also known as sea unicorns. Sea slugs are a special member of the mollusk family. It is a shellless snail and a relative of the conch, and the shells and breathing gills on the body have degenerated and disappeared. Their shells have degenerated into inner shells.
The sea slug is also a hermaphrodite organism, inhabiting the seabed, naked, and the two reproductive holes of the male and female are connected by an oviparous groove. There will be a tintin on the body, a vagina, and you have to cooperate with each other when mating. But they still do not argue or grab, but share the blessings and difficulties, and proceed at the same time.
Also known as "Sea Hare"
However, some sea slugs, when mating, will shoot each other's headshots! The main thing is that the tintin of this sea slug looks too strange, and the top is bifurcated. The end that is going to enter the other person's vagina is thick and blunt, which is the main tool used to transport sperm. The other end is sharp and thin, and there is not much damage.
Some sea slugs like "multi-person sports" when mating. People who do ocean surveys often find dozens of sea slugs stacked on top of each other on the seabed, and you connect me and I connect with him, densely stacked into a small tower.
It is the sea slugs that chain the tails
However, although many hermaphrodites do not have to fight during the mating process, this does not mean that there is no fight. Take the flatworm, for example.
This flat-shaped animal looks like a handkerchief on the outside, flattened, colorful, with beautiful large lace. But when they mate, the ferocity index explodes, and they have to fight a good fight first!
Flat worms are usually like flower butterflies, flat and flat on the bottom of the water twisting and twisting, fluttering, fluttering, looking good and wandering, but as soon as they encounter a suitable combat object on the other side, they will erect their bodies.
The two flatworms erected their bodies, not to compare their height, but to show the white tintin on their abdomen, which was an important weapon they would use in a moment. Next, they will fight each other closely and start fighting bayonets. Only to see them stab at each other, while deftly dodging, you enter me retreat, you retreat I enter...
It's like a fencing competition, except that they are not fighting for the gold medal, but for the status of the male. Whoever pierces the other person's epidermis first and quickly injects the sperm into it wins. And the one who lost, was stabbed, not to mention, but also had to obediently be a sister, pregnant with a baby.
If the chess opponent is matched, this special fencing game usually has to be played for an hour. If after a long time there is no winner or loser, they will cease the battle, put away Tintin, and leave it at that. More often, though, both sides will be stabbed, and both sides will have to have children.
The flat worms fight each other's bayonets, at least it is still clear, the king is defeated, willing to gamble and lose, and frank. But another creature, a snail, is secretly stabbing a knife.
When snails are mated, both sides will fertilize, and it is reasonable to say that the opportunities are equal, and there is nothing to compete for. But the problem is that snails have a special spermicidal physique. More than 99% of sperm lose their lives immediately after entering the snail's body.
Because there is an organ in the snail's body called a mating sac. It secretes an enzyme that dissolves the sperm. Why do snails have to have such a physique, they do not want to reproduce?
Contrary. Scientists speculate that the snail's physique is to allow the party who receives the sperm to have more choices, destroy the sperm that they don't like, and let the snail with the best genes be the child's father.
This contraceptive mechanism is also flawed. Each snail is hermaphrodite, and the other party knows exactly what means they have. So, the snails also evolved a "Cupid's Arrow" that secretly shot at each other during mating.
This arrow carries a kind of mucus that causes the duct muscles of the mating sac to contract, making the enzymes inside it difficult to flow out. In this way, the survival rate of their own sperm becomes greater.
Not only that, but scientists have also found that some species of snails have produced fewer eggs and shorter lifespans after being hit by this cupid arrow.
Therefore, while shooting arrows, snails will also avoid being shot by the other party's arrows. Don't look at the time when two snails are mated, it looks intimate and warm, in fact, each has its own ghost thoughts, it is really a plastic couple.
Edited | Liangshan
Typography | Liangshan
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