Question: In the animal kingdom what type of sexuality is described as sexual behavior toward both male and females?

<P0-S0> Extended female sexuality is where the female of a species mates when infertile. <P0-S1>  In most species, the female only engages in copulation when she is fertile. <P0-S2>  However, extended sexuality has been documented in old world primates, pair bonded birds and some insects (such as carrion beetles). <P0-S3>  Extended sexuality is most prominent in human females who exhibit no change in copulation rate across the ovarian cycle. <P0-S4>  Although this behaviour incurs costs to females, such as energy and time, many researchers have proposed reasons for its existence. <P0-S5>  These hypotheses include the male assistance hypothesis, which proposes that females gain non-genetic benefits (such as food and shelter) in exchange for sexual access. <P0-S6>  A sub-hypothesis of this is Hrdy's, proposing extended female sexuality as an adaptive process aiming to creating paternity confusion in males. <P0-S7>  Alternative hypotheses, classified as 'male-driven', claim that extended female sexuality occurs due to male adaptations, resulting from an inability to detect fertility status in females or to dampen immune responses against sperm. <P0-S8>  Finally, Spuhler's hypothesis suggests that the behaviour may have arisen as an incidental effect of larger adrenal glands in humans. <SEP> <P1-S0> Homosexual behavior in animals is sexual behavior among non-human species that is interpreted as homosexual or bisexual. <P1-S1>  This may include sexual activity, courtship, affection, pair bonding, and parenting among same-sex animal pairs. <P1-S2>  Research indicates that various forms of this are found throughout the animal kingdom. <P1-S3>  As of 1999, about 500 species, ranging from primates to gut worms, have been documented engaging in same-sex behaviors. <P1-S4>  According to the organizers of the 2006 Against Nature? <P1-S5>  exhibit, it has been observed in 1,500 species. <SEP> <P2-S0> An alternative mating strategy is a mating strategy used by males or females that differs from the prevailing strategy of the sex. <P2-S1>  The mating strategies of animals are diverse and variable both across and within species. <P2-S2>  Animal sexual behavior and mate choice directly affect social structure and relationships in many different mating systems, whether monogamous, polygamous, polyandrous, or polygynous. <P2-S3>  Though males and females in a given population typically employ a predominant reproductive strategy based on the overarching mating system, there is still significant variation in behavior among individuals of the same sex. <P2-S4>  Alternative strategies provide animals of certain phenotypes with a different means for obtaining mates. <P2-S5>  The study of alternative mating strategies is critical to correctly characterizing the diverse sexual behavior practiced by animals in a population and understanding the strength of selection on these individuals. <SEP> <P3-S0> Bisexuality is romantic attraction, sexual attraction, or sexual behavior toward both males and females, or romantic or sexual attraction to people of any sex or gender identity; this latter aspect is sometimes alternatively termed "pansexuality."