September 18, 2019
We’ve already examined homosexuality in nature as a way to establish social bonds, practice sex, or just have fun. Although these theories are well-supported with data, there are other evolutionary reasons we see animal homosexuality that don’t fit into those hypotheses. The intrasexual conflict hypothesis suggests that homosexuality occurs as a byproduct of male:male competitiveness, as seen in male vervet monkeys. They engage in homosexual activities in order to establish and reinforce dominance hierarchies. Submissive
September 11, 2019
There are two main hypotheses for the existence of female orgasm. Shutterstock The first is the byproduct hypothesis. It states that the female orgasm is a mere side effect of its occurrence in males. Basically, since the structure and function of the penis is so critical to male reproductive success, and the clitoris is a vestigial penis, females enjoy the benefit of orgasm for no real evolutionary reason. The second major hypothesis for the existence
September 4, 2019
We’ve probably all heard the baby shark, mommy shark song by now, but did you know that shark reproduction is notoriously difficult to study? Sexual reproduction varies substantially between genera. For example, female sand tiger sharks exhibit a remarkable reproductive mode that combines elements of both oviparity and viviparity; this hybrid form of reproduction is called “ovoviviparity.” Females give birth to live young that have been nourished by egg yolks inside the uterine cavity. There
August 28, 2019
The short answer is: YES, sex for pleasure can be found in the animal kingdom. Shutterstock We don’t commonly associate animals with sex for pleasure. There are several reasons for this. First, we cannot simply ask animals how it felt. Was it good for you? Did you come? It’s utterly impossible. Of course, in species where torturous sexual techniques involve participants getting stabbed, strangled, or killed, it is probably safe to assume that this would
August 21, 2019
We often joke about rabbits having more sexual relations than most other creatures. The truth is, they don’t. However, in female rabbits, the process of ovulation is linked to the process of copulation. Each time she has sex, she gets pregnant. Shutterstock The gestational period for a rabbit is around thirty days. Approximately one week before giving birth, a pregnant female will begin to dig an underground chamber for her kits. Inside, she constructs a
August 14, 2019
The ubiquity of homosexuality that occurs in nature means that its existence is likely to be explained in different ways in different scenarios. In truth, biologists often get carried away with our requirement to find an evolutionary purpose for all animal behaviours. While this makes good scientific sense for the most part, there are times when it doesn’t. Sex is awesome. Humans engage in homosexual and heterosexual activities completely outside the realm of biological fitness.
August 7, 2019
Rape is common among animals. Biologists call it sexual coercion so that we have a fancy and less offensive term to use, but the fact of the matter is that it’s animal rape. Females of several mammalian and primate species possess a suite of physiological adaptations that can ultimately result in abortions; however, it isn’t a cognitive process. The body can recognize that something isn’t right, whether that’s the timing, the partner, or something else.