Why the females prefer males with mustaches, we can’t say. (Do fish have lips?) The females prefer males with mustaches to males without mustaches. Male fish of the species Mexican molly or short-finned molly ( Poecilia sphenops) have mustache-like structures on their upper lip. So how do females pick a mate? How do they decide what is sexy? Sexy body structures show off the health and good genes of a male, like fish mustaches. The males that get to pass on their genes are "fittest" in the sense of genetic fitness their genes will continue on to the next generation. By selecting a mate, the females are also picking which males get to pass on their genes. Females want their offspring to survive and prosper, so they want to pick a mate with good genes. Intersexual selection is more than just females deciding which guy is the sexiest. When females choose their male partners, it is called intersexual selection, and when males fight over access to females it is called intrasexual selection. There are two main ways that animals find a mate:īoth of these are types of sexual selection, where the ability to mate varies based on individuals’ traits. Since other animals haven’t discovered the internet yet, they can’t rely on dating sites or Facebook for social interactions so they have to meet in real life (gasp). "My null hypothesis is that they do," he said, adding a challenge: "Prove that they don't.Finding a mate is a big deal in the animal world, and it accounts for a lot of animal behavior. "There are damn good evolutionary reasons for animals to enjoy sex and have orgasms," said Bekoff. And of course, Nature offers her own proof that sex is pleasurable: plentiful offspring.
In this way, a human’s experience of sex may be qualitatively different than an animal’s, but no less (or more) enjoyable. The human cortex may interpret pleasurable sensations and assign them special meaning (or not). "Our chief anatomical difference from is up in the prefrontal cortex," explained Berridge, but the generation of pleasure is happening at "lower" brain structures. His experiments suggest a further homology, one of emotional experience. Primitive feelings Sweets and sex - as well as drugs, winning the lotto and every other rewarding experience -stimulate the same brain circuit, said Berridge, and this pleasure circuit is common to both human and non-human animals. If we believe the infant "enjoys" the sweet taste based on her pleasant expression, it follows that the rat likely enjoys it too. Their brain reactions also mirror one another. When given something pleasurable to taste, both rats and humans make almost identical mouth shapes and sucking motions. Kent Berridge, a biopsychologist at the University of Michigan, compared the brain activity and facial expressions of animals to that of a more readable creature: human infants. And we can't ask a tomcat how his date went last night. Al that said, we can never completely know another being's emotional state, Bekoff points out, adding that it can even be hard to judge that of a human. Bonobos and possibly dolphins also pursue sex recreationally, Bekoff said.
Humans, though, are not alone in wanting sex regardless of reproductive timing. Besides, if wolves got it on during the summer, it would be poor family planning their delicate pups would be born in the dead of winter, he said. For example, a male wolf gets "locked" inside the female for up to a half hour, he said. In the wild, having sex makes one vulnerable to attack. Then why do, say, wolves abstain most of the year? "It is not that they don’t like it, it is just who they are," Bekoff said.
They are difficult to measure directly but by watching facial expressions, body movements and muscle relaxation, many scientists have concluded that animals reach a pleasurable climax, he said. Really wild orgasms Not only do animals enjoy the deed, they also likely have orgasms, he said. But do they like it? According to experts, there are two answers: "yes" and "it is impossible to know." "Mosquitoes, I don’t know," hedged Mark Bekoff, a University of Colorado biologist and author of "The Emotional Lives of Animals" (New World Library), "but across mammals, they enjoy sex." In fact the enjoyment of sex among humans and among animals may be similar in that it's all experienced in very primitive parts of the brain. Animals obviously hook up, at least during mating season.
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