When it comes to sex, males and females are not always equal in their desires. Similar to the struggle between a parasite and its host, some species are locked in an evolutionary arms race between the sexes, with each gender battling to put its best interests forth. Although male and female sexual preferences and tactics are as variable as the thousands of species they represent, a particular species of snake provides an interesting example of conflict that can occur during mating itself, researchers describe in the journal Proceedings of the Royal Society B. The authors focused their paper on an intimate discussion of red-sided garter snake behaviors. When red-sided garter snakes are ready to mate, several dozen males find their way to a female. Rather than pick the nicest looking or most impressive male, mating is more of a crapshoot for the female, with the closest male latching on as soon as the female presents herself by opening her cloaca, an orifice that leads into the vagina. In doing so, however, she opens up her cloaca, effectively allowing the males to sneak in and get what they want. Female red-sided garter snakes, not surprisingly, prefer to get copulation over and done with. They attempt to bid their mate goodbye as soon as he has handed over his sperm, and sometimes, even sooner than that.
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Most species of snakes show no sexual dimorphism and other methods are necessary to differentiate between males and females. The reptilian ovary consists of follicular cells, epithelial and endothelial cells, nerve tissue and connective tissue in an elastic tunic. The right ovary is cranial to the left but may overlap. Both ovaries are present. Some fossorial species have lost one ovary and oviduct. There is a region of mucosal folds and alveolar glands in the cranial oviduct, the receptaculum seminis, that serves for sperm storage allowing continued fertility from one insemination. The oviducts empty into the urodeum through the urogenital papillae. The developing embryos or eggs in the right side are carried anterior to those on the left. The left oviduct may be lacking in some taxa of snakes including Typhlopidae. The testes are usually elongated and light-coloured, and consist of seminiferous tubules, interstitial cells, blood vessels and connective tissue.
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Skip to content. NEW YORK — The 50th anniversary of the birth control pill — the ultimate remedy which revolutionized the dating and mating game forever — presents a good excuse to contemplate some of the less studied, but all the more intriguing remedies people use to improve their sex lives, from Africa to China, India, Japan, Papua New Guinea and beyond. A few described below are illegal. But then again, so is the birth control pill in many countries. This list is intended for mature audiences only and you may not want to try some of these at home.
