Mating

thumb|The symbol for marriage, often used in genealogy

Sex, more formally known as sexual intercourse, coitus, or copulation, is an intimate social activity typically involving the insertion of the erect male penis inside the female vagina and followed by thrusting motions for erotic pleasure, biological reproduction, or both. This specific type of sex is also known as vaginal intercourse. However, other forms of penetrative sexual intercourse also exist, including anal sex, oral sex, fingering and penetration by use of a dildo, and vibrators. The desire for these activities is grounded in natural human instinct and they involve physical intimacy between two or more people, usually enacted by humans solely for physical-emotional pleasure, sometimes contributing to human bonding.

permanent pointed projection on the head of various animals

thumb|250px|Blue-tailed damselfly|Blue-tailed damselflies(Ischnura elegans) mating

A soulmate is a person with whom one feels a deep or natural affinity. This connection is often associated with love, romance, intimacy, sexuality, spirituality, or compatibility, and may also involve trust and comfort.

In Greek mythology, Philotes (; Ancient Greek: ) was a minor goddess or spirit (daimones) personifying affection, friendship, and sexual intercourse.

a set of display behaviors in which an animal, usually a male, attempts to attract a mate

mating pattern in which individuals with similar phenotypes (e.g. size, colour) mate with one another more often

sexual behavior of non-human animals

mating behavior in certain animals

thumb|A pair of clicking stream frogs (''Gray's stream frog|Strongylopus grayii) in amplexusthumb|Orange-thighed frogs ([[Litoria xanthomera'') in amplexus]]

sexual union between male and female, involving the transfer of sperm

competition of sets of genes, traits, or species, that develop adaptations and counter-adaptations against each other

process of selection a romantic or sexual partner

right|thumb|220px|During pregnancy, a two-way traffic of immune cells may occur through the placenta. Exchanged cells can multiply and establish long-lasting cell lines that are immunologically active even decades after giving birth. Microchimerism is the presence of a small number of cells in an individual that have originated from another individual and are therefore genetically distinct. This phenomenon may be related to certain types of autoimmune diseases although the responsible mechanisms are unclear. The term comes from the prefix "micro" + "chimerism" based on the hybrid Chimera of G

darts that some snails shoot into each other during mating

thumb|Video of a Guérewol performance. thumb|right|Participants in the Guérewol perform the Guérewol dance. The eventual winner was the tall young man in the middle. Photographed 1997 in Niger. thumb|A young maiden judges men competing in a Guérewol in 1997.|300x300px The Guérewol (var. Guerewol, Gerewol) is an annual courtship ritual competition among the Wodaabe Fula people of Niger. Young men dressed in elaborate ornamentation and made up in traditional face painting gather in lines to dance and sing, vying for the attentions of marriageable young women. The Guérewol occurs each year as the

practice when a female cannibalizes her mate prior to, during, or after copulation

mating ritual in hermaphroditic flatworms

term in evolutionary biology

movies for sexual arousal of pandas

gelatinous secretion used in the mating of some species

courtship behavior of humans

secondary sex characteristic on some mature male frogs and salamanders

mating practice in invertebrates

A homewrecker (sometimes styled as home wrecker or home-wrecker) is a person, object or activity that causes or comes close to causing the breakup of a marriage (or similar partnership). The homewrecker is said to have taken one of the spouses away from the marriage, thus "wrecking" the marital home.

bonded animals who cooperate to produce offspring

auditory signal used by animals to attract mates

Social system

nutritional gift given in sexual reproduction

characteristic of an animal

gene

natural process of reproduction in the animal kingdom