OldWoodSpecter said:

That "knowledge" came gradually into the genes of the apes from the days of early mammals from the dinosaur age, and the basis of the birth instinct is even older, it's from the days of early fish that lived in seas that were carrying eggs.

And not ever sex in animal world is a rape. Many species have females that are capable of defending themselfs, or even killing the male, so it's not like they just sit there and scream for help. In fact females seduce the males, or vice versa. Sex is moslty voluntary in animal world. It is voluntary because the evolution benefits from the fact that both male and female want each other which means they both want each others genes. That way best genes go with best genes.

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Quote:

Beyond male and female

While two types of sex cells exist - sperm and eggs - it is more difficult to sort individuals into these binary classes. Several species have more than just male and female genders, where gender is defined as the body and sexual behavior of an individual.

In some species, an individual's body may be difficult to classify as male or female. Most plants and some fish are hermaphrodites - capable of producing eggs and sperm. Some lizards are unisexual. There are no male whiptail lizards, and females will mount each other, prompting hormonal changes that result in cell division - a true ''virgin birth.''

^{A single individual also may switch from male to female or vice versa and back again - that is, may switch from producing sperm to producing eggs - due to a change in hormones triggered by external circumstances. In any coral reef, for example, about 25 percent of the fish have changed sex in their lifetime. Over 50 species of angelfish, wrasses, parrot fishes and groupers have changed from male to female or vice versa. Other invertebrates, such as shrimp and oysters, also may change sex.}

''Gender can be surprisingly labile,'' says Bob Warner, who was among the first to study sex-changing fish in the 1970s. ''The young themselves may develop as one sex or the other, depending on the environment in which they find themselves. And individuals may function first as one sex, then another, over the course of their lives, and the change can be socially controlled.''

For instance, if the sole male is removed from a group of cleaning wrasse, the largest female will start to behave like a male within hours. Within 10 days she - now he - will produce sperm.

Behavior is not tied to one's chromosomes, either - many species have three or more genders. For instance, bluegill sunfish have two different male genders - ''parental'' males who control territory and mate with females, and ''end-runner'' males, who are smaller with different coloring. End-runners will dart in and release sperm where a female and parental male are mating.

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shroomydan said:

How on earth did we learn how to deliver babies?

God programed evolution so that it would turn out that way

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