. Unlike ordinary bird nests, the gardener's nest not only has a distinct color, but also has many decorations, which look fancy.

When humans feel that this kind of bird nest is not practical, they don’t know that female gardeners value this point, so if a male bird has a poor decoration level, they may not be able to get a wife in their lifetime.

Gardener birds will concentrate on decorating the house to courtship

, and then let’s talk about the magical manifestations of mating, taking the dog we mentioned above as an example. The reproductive organs of male dogs are quite special. After ejaculation, they will "knot" and firmly get stuck in the female's reproductive tract. In this case, dogs who complete mating tend to keep their "butts" connected.

And another animal that is more in contact with humans - cats, also have their own secrets when mating. Male cats have barbs on their reproductive organs, and these bulges help them stimulate the females during mating and make them ovulate as quickly as possible. Of course, some people think that this structure is to scrape out the semen left by the previous one.

There are some barbs on the reproductive organs of male cats

In short, these seemingly strange mating behaviors are actually to increase the "probability of fertilization". For animals that do not need to pay attention to civilization, reproduction is the ultimate goal, and it doesn’t matter how the process is “eye-smelling”!