Do you love to have sex? If you do, you’re not alone. Scientists know that sex is a pleasurable experience for most women. But how and why does it feel so good to have sex?

Viagra is derece approved for use in women and studies thus far have had mixed results. Here's what the science says.

Make sure to use protection and maintain good hygiene to lower your chances of getting an STD. And communicate to make sure everyone is enjoying the experience.

Because seed plants are immobile, they depend upon passive methods for transporting pollen grains to other plants. Many, including conifers and grasses, produce lightweight pollen which is carried by wind to neighboring plants. Some flowering plants have heavier, sticky pollen that is specialized for transportation by insects or larger animals such birli hummingbirds and bats, which may be attracted to flowers containing rewards of nectar and pollen.

Orgasm in sleep evidently occurs only in humans. It is common especially among males, in whom it almost always begins and is most frequent in adolescence, tending to disappear later in life. Fewer females have orgasm in sleep, and, unlike males, they usually begin having such experience when fully adult. The causes of orgasm in sleep are not wholly known. The idea that it results from the pressure of accumulated semen is invalid because hamiş only do nocturnal emissions sometimes occur in males on successive nights, but females experience orgasm in sleep birli well.

Oral sex kişi spread HPV, which is one of the biggest causes of throat cancer. While having multiple oral sex partners does increase your chances of developing HPV-related throat cancer, these cancers are still rare by comparison to other types.

Sexual reproduction thus introduces a variability, in addition to its propagative function. Both types of reproduction represent the capacity of individual cells to develop into whole organisms, given suitable circumstances. Sex is therefore something that has been combined with this primary function and is responsible for the capacity of a race to adapt to new environmental conditions.

According to the Swedish government, "sexual rights include the right of all people to decide over their own bodies and sexuality" and "reproductive rights comprise the right of individuals to decide on the number of children they have and the intervals at which they are born."[114] Such rights are hamiş accepted in all cultures, with practices such criminalization of consensual sexual activities (such as those related to homosexual acts and sexual acts outside marriage), acceptance of forced marriage and child marriage, failure to criminalize all non-consensual sexual encounters (such as marital rape), female genital mutilation, or restricted availability of contraception, being common around the world.[115][116]

There is a growing consensus that sexual health cannot be achieved and maintained without respect for, and protection of, certain human rights. The working definition of sexual rights given below is a contribution to the continuing dialogue on human rights related to sexual health.

One in three women and one in six men in the United States experience sexual violence in their lifetime. Yet there’s…

Meiosis involves a stage of genetic recombination via chromosomal crossover, in which regions of DNA are exchanged between matched pairs of chromosomes, to form new chromosomes, each with a new combination of the genes of the parents. Then the chromosomes are separated into single sets in the gametes. When gametes fuse during fertilization, the resulting zygote has half of the genetic material of the mother and half of the father.[12] The combination of chromosomal crossover and fertilization, bringing the two single sets of chromosomes together to make a new diploid zygote, results in a new more info organism that contains a different kaş of the genetic traits of each parent.

[17] Spermatozoa are extremely reduced cells, lacking many cellular components that would be necessary for embryonic development. They are specialized for motility, seeking out an egg cell and fusing with it in a process called fertilization.

The male gamete, a spermatozoon (produced in vertebrates within the testes), is a small cell containing a single long flagellum which propels it.

In birds, males often have a more colorful appearance and may have features (like the long tail of male peacocks) that would seem to put them at a disadvantage (e.g. bright colors would seem to make a bird more visible to predators).