Spiders also groan when they do it.

People are not the only creatures that make sounds when making love. During mating, the female Physocylus globosus spiders emit high-frequency cries to let their partners know what to do.

During mating, the female Physocylus globosus spiders emit high-frequency cries to let their partners know what to do. (Photo: LiveScience)

These shrill voices sound like the sound of cloth tearing and responding to the male genital contraction rhythm while in females during mating.

The female spider can store sperm of different guys in her body and choose a lucky guy to fertilize her eggs. The contraction stimulates the female and increases his chances of sperm selection.

"Male spiders squeeze females more often when mating will produce more juveniles than inferior guys," said William Eberhard researcher at the University of Costa Rica and the Smithsonian Tropical Research Institute in Panama. .

However, if you overdo it, it can hurt your children. When the male squeezes too hard or too long, the female will yell to let him adjust the tempo and relax.

To produce a shrill sound, the female rubbed the ends of her legs near her mouth to the surface of its fangs.

Male genitalia placed at the end of the body. When mating, the spider pushes its tool into the female. The leg muscles move when lovemaking, creating a regular contraction movement that causes the female to exclaim.

The researchers gave 68 P. globosus virgins to mate with two males. They found that the number of male contractions was related to the number of times the children cried when they did "that". That loud voice became more urgent when the male refused to relax even though she had reminded him earlier.

The obedient spiders often listen to the instructions of their children will create more of their own young. Scientists say the squeeze action pushes sperm deeper into the female body, making it easier to fertilize eggs.

MT