Animal sexual behaviour takes many different forms, including within the same species. Common mating or reproductively motivated systems include monogamy , polygyny , polyandry , polygamy and promiscuity. Other sexual behaviour may be reproductively motivated e. When animal sexual behaviour is reproductively motivated, it is often termed mating or copulation ; for most non-human mammals , mating and copulation occur at oestrus the most fertile period in the mammalian female's reproductive cycle , which increases the chances of successful impregnation. Females often select males for mating only if they appear strong and able to protect themselves. The male that wins a fight may also have the chance to mate with a larger number of females and will therefore pass on his genes to their offspring. Historically, it was believed that only humans and a small number of other species performed sexual acts other than for reproduction, and that animals' sexuality was instinctive and a simple " stimulus-response " behaviour. However, in addition to homosexual behaviours, a range of species masturbate and may use objects as tools to help them do so.


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Scientists in the US have for the first time examined the dolphin clitoris in close detail and discovered it is remarkably similar to the organ in humans. Analysis of the structure of the dolphin clitoris suggests the marine mammals could experience sexual pleasure and potentially climax. Orbach and her colleague Dr Patricia Brennan, assistant professor of biology, discovered that the clitoris in female bottlenose dolphins is large and well developed. The structure of the tissue suggests it may expand — for example, in response to stimulation — and bundles of nerves under the clitoral hood may increase sensitivity and the potential for pleasure, as has been found in the human clitoris. Like humans, primates and rats, they are known to copulate all year round, even during times when they cannot conceive. News Environment Dolphins have sex for the fun of it, say scientists Dolphins could be having orgasms and indulging in a roll in the waves purely for enjoyment, new international research suggests.
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Sex, we are told, is pleasurable. That's because most scientific accounts of sexual behaviour rest upon evolutionary explanations rather than the more immediately relevant mental and emotional experiences. To say that we have sex because it helps us to preserve our genetic legacies would be entirely accurate, but the more fleeting, experiential, pleasurable aspects of that most basic of social urges would be missing. It would be like staring at a painting with half the colour spectrum removed from it.
Given the popularity that dolphins enjoy, it is certainly understandable that at least some of the information available in the media, the internet and from the minds of our fellow human beings is not always scientifically sound. Here are 5 commonly heard myths concerning dolphins. Number 3 Dolphins are one of the only animals to have sex for pleasure This particular myth tends to pop up with regularity in conversation whenever the subject turns to sex. Even the writers at the ever vigilant snopes. The problem here is that volumes could be and have been written on the definition of sexual behavior in animals and the description of pleasure. The truth here is that animals almost never engage in a sexual act with the specific intent of producing offspring; during ovulation or otherwise.